1.Alabama
Jeff Sessions,61 incumbent

Declared Democrats
1.Vivian Davis Figures, 51, CEO Figures Legacy Education Foundation, BSC- Management Sciences, State Senator 1997- and Education Committee Chair, former Mobile City Councillor

2.Johnny Swanson, Lawyer, Army Veteran, B.A- Political Science, frequent candidate

Prospective Democrat
1.David Marsh, Trial Lawyer and firm Partner, brother of Republican State Senator

According to this web site, http://www.politicalparlor.net/... Jefferson County District Judge Pete Johnson said he wasn't running on August 4.  They are also the source of the David Marsh rumor.

A Survey USA poll conducted upon the official entrance of Vivian Davis Figures into the race had Jeff Sessions leading her 59-37%, which tracks pretty closely with his approval/disapproval ratings.

2.Alaska
Ted Stevens,84, Incumbent

Potential Republican primary challengers
1.John Binkley, former State Senator
2.Dave Cuddy, Former State Representative, 1996 challenger
3.John Harris, former State House Speaker

Declared Democrats
1.Nels Anderson, Former CEO Bristol Bay Native Corporation, Former State House Majority Leader, 2002 candidate for nomination for governor

2.Rocky Caldero,41, Seafood Packing Plant Manager, Air Force Veteran, BSc-
Biology, Unalaska City Councillor

3.Frank Vondersaar, Frequent Candidate

Prospective Democrats
1.Mark Begich,46, Commericial Buildings Owner, son of former Congressman, Mayor of Anchorage 2003-

2.Eric Croft,44, Lawyer and President Alaska Professional Testing Inc, BSc-Electrical Engineering, 2006 candidate ofr nomination for governor, Former State Representative 1996-2006

3.Johnny Ellis,48, Commissioner Western Interstate Commission for Higher Education, former business owner, State Senate Minority Leader

Everything seems to be frozen here while Alaskans wait to see what Ted Stevens and Mark Begich do.  Stevens is possibly under criminal investigation and, as we see, several Republicans are eyeing primarying him (if he isn't indicted).  On the Democratic side, the DSCC favored candidate is Anchorage mayor Mark Begich.

3.Colorado, Wayne Allard is retiring.
Republican
1.Bob Schaffer, former U.S Representative, State Board of Education Trustee, 2004 Candidate for nomination for U.S Senate

Declared Democrat
Mark Udall,58, Former Executive Director Colorado Outward Bound, Congressman 1998-, former State Representative 1996-1998

Bob Schaffer has recently hinted that he isn't certain to run.  The Republicans seem fairly divided here, as they are in many states, between the 'moderates' and the hard liners.  The more moderate former Republican Congressman Scott McInnis was pushed out of the race by the hard liners.

4.Georgia
Saxby Chambliss,65, incumbent

Declared Democrats
1.Vernon Jones, Bachelor of Business Administration, Dekalb County CEO, former State Representative

2.William 'Dale' Cardwell,45,  Investigative T.V Reporter, B.A's Journalism and Political Science

3.Rand Knight,35, P.H.D- Ecosystems Analysis

Prospective Democrats
1.Roy Barnes,60, Lawyer, former Governor 1998-2002 (not likely to run)

2.Thurbert Baker, State Attorney General

Democrats suffered a setback when wealthy lawyer and former State Representative Wyc Orr, who had shown interest in the race by giving a series of speeches denouncing Republicans and became subject of a draft movement, announced he wouldn't run.  On the other hand, longtime State Attorney General Thurbert Baker sparked some interest when he said that he might be interested in either running for the U.S Senate or for Governor in 2010.

Of the declared candidates, which could be the final field, Vernon Jones is probably the frontrunner, but he seems to be a 'love him or hate him' kind of guy.  Dale Cardwell could have some profile as an award winning investigative T.V reporter but he seems to have turned off some Democrats with some conservative positions, although he is a mainstream Democrat on many other issues.  Low profile Rand Knight could be an interesting candidate if the net roots get behind him.  He could be a test case for the power of the net roots in a non 'blue' state.

5.Idaho
Larry Craig is 'retiring' before the end of his term.  Lieutenant Governor Jim Risch is expected to be appointed his successor by Governor Otter, but, who knows.  
Rex Ranmell,47, Veterinarian and former Rancher, 2002 and 2004 State House Candidate

Declared Democrats
1.Larry La Rocco,62, Former Brokerage Firm Vice President, Former U.S Senator Field Rep, Retired Army Captain, MSc-, 2006 Lieutenant Governor nominee, Former Congressman 1990-1994

Democrats have united behind Larry LaRocco.  There could be additional Republicans running agaist the appointed Senator.  Ranmell is a fringe candidate who has the view of "it's my land and I can do anything I want with it". He has been fined by the state several times for exercising that perogative and has run for office in response.  He seems to be particularly interested in running against Jim Risch.  All that said, the state did back off on several things they said he couldn't do and changed the laws when he challenged them, so maybe he does have some valid points.

6.Kansas
Pat Roberts,72, incumbent

Prospective Democrats
1.Joe Hoagland, former Republican State House Majority Leader

This state is a disappointment.  The state is trending Democrat as Republican moderates and hard liners battle and, increasingly, the moderates join the Democratic Party.  Popular governor Kathleen Sebelius seems to have made it popular to become a Democrat in the state.
Pat Roberts should be vulnerable as the former intelligence committee chair who did not do his job when the Republicans were in the majority in the U.S Senate.  Their should be no shortage of candidates wanting to hold the George Bush lackey to account, but so far, nobody has stepped forward.  Joe Hoagland is the latest Democrat the party is trying to get to run.

7.Kentucky
Mitch McConnell,66, incumbent

Potential Republican Primary Challenger
1.Larry Forgy, 1997 and 2001 nominee for governor

Prospective Democrat
1.Greg Stumbo, Lawyer and former Assistant County Attorney, 2007 Lieutenant Governor candidate for nomination, State Attorney General 2003-2007, Former State Representative and Majority Leader

2.Andrew Horne, lawyer and former Marine, 2006 Congressional candidate for nomination

Much of this race could hinge on the outcome of the governors race later this year.  Larry Forgy could primary McConnell as payback for McConnell trying to defeat Republican governor Ernie Fletcher.  Democrat Stumbo is waiting to see if Democrat Steve Beshear defeats Fletcher in the general election as expected and has only announced that he has formed an 'exploratory committee' so far.  Stumbo, I gather, has a somewhat mixed record as a Democrat.  He was the Lieutenant Governor running mate with Bruce Lunsford, who many Democrats regard as a DINO (Democrat in Name Only).  Still, I gather the sentiment is that conservative Democrats in the state (of which there are still a lot) will back the moderate Steve Beshear for governor and, in return, the moderates and liberals will back Stumbo.  Andrew Horne is the subject of a draft movement, but he lost the primary pretty badly to now Democratic Congressman John Yarmuth in 2006, so it remains to be seen how strong a candidate he could be. (Kentucky residents could tell me if my analysis here is correct).

8.Maine
Susan Collins,56, incumbent

Declared Democratic candidate
1.Tom Allen,63, Lawyer, Rhodes Scholar, Congressman 1996-, former Mayor or Portland

Should be a good race.

9.Minnesota
Norm Coleman,59, incumbent

Declared Democratic candidates
1.Al Franken,57, B.A-General Studies, Author and Comedian/Actor, former Radio Talk Show Host

2.Mike Ciresi, Trial Lawyer and Firm Chair, 2000 candidate for nomination for U.S Senate (narrowly defeated)

3.Dick Franson,78, Retired Army First Sargeant, B.A- Public Administration, Minor- Mid East Studies, former Minneapolis City Councillor, frequent candidate

4.James Cohen, Lawyer and Environmental Group Founder, Son of Former State House Majority Leader, former Congressional nominee

Prospective Democratic candidate
1.Jack Nelson-Pallmeyer,51, B.A- Political Science, M.A- Divinity, Justice and Peace Studies Professor and Author

This should be the final field, with or without Pallmeyer.  Franken and Ciresi are the clear frontrunners.  Minnesota is one of a handful of states with a convention system in addition to a primary.  I don't know if the candidates have agreed that the winner of the convention will be the nominee.

10.Mississippi
Thad Cochran,71, incumbent

11.North Carolina
Elizabeth Dole,72, incumbent

Declared Democratic candidate
1.John Ross Hendrix,57, Graphic Artist, former Paratrooper, former Republican, frequent candidate

Prospective Democratic Candidates
1.Kay Hagan,54, Lawyer, State Senator 1998- and Chair Appropriations Committee

2.Ted Kaplan,61, CEO Kaplan Early Learning Corp, Navy Veteran, former State Representative 1976-1982, State Senator 1982-1994 and Majority Leader 1986-1992, Forsythe County Commissioner 2006-

3.David Young, 48, Travel Agency Co-Owner, 1998 Congressional nominee, Buncombe County Commissioner and incoming President North Carolina Association of County Commissioners

4.Howard Lee,74, Chair State Board of Education

5.Grier Martin,39, Lawyer, Army Reserve Major, State Representative 2004- and Chair Homeland Security, Military and Veterans' Affairs Committee

Grier Martin is the netroots approved candidate.  However, since announcing that he was interested in running back in June, there has been no further announcements.  Nor from any of the other prospective candidates (except that Howard Lee added himself to the list of prospective candidates).

12.Nebraska
Chuck Hagel,62, incumbent

Primary challengers
1.Jon Bruning, State Attorney General
2.Hal Daub, former Congressman
3.Pat Flynn, Financial Analyst

Prospective Primary Challenger
1.Tony Raimondo, Chair and CEO of Behlen Manufacturing

Prospective Democratic Candidates
1.Mike Fahey,64, Former CEO American Land Title Company, Omaha Mayor 2001-
2.Bob Kerrey,64, Former U.S Senator and former Governor
3.Scott Kleeb, Political Science Instructor, Rancher, 2006 3rd Congressional District nominee

The Democrats seem to be waiting to see whether Hagel runs again before announcing.  However, that he is being primaried could entice them to run, especially as the Republican anger is over that Hagel is refusing to support the policies of the President with a 30% approval rating.

13.New Hampshire
John Sununu,44 incumbent

Declared Democratic candidates
1.Steve Marchand,34, Public Policy Consulting firm Managing Director, BSc- International Relations, Masters of Public Administration, Mayor of Portsmouth

2.Katrina Swett, Lawyer and former Congressional staffer, 2002 Congressional nominee, B.A- Political Science, P.H.D- History

3.Jay Buckey, Medical Professor and Electrical Engineering Professor, former Astronaut, Air Force Reserve Major

Prospective Democratic Candidate
1.Jeanne Shaheen,61, Director Harvard Institute of Politics, former Teacher and Small Business Owner, Former Governor 1996-2002, former State Senator 1990-1996

Democrats seem to be waiting on whether Shaheen decides to run or not.  Steve Marchand had previously said that he would drop out if she entered the race, but he has backed off on that somewhat.  Marchand and Swett seem to be the frontrunners without Shaheen, but Buckey garnered some interest when Joe Trippi wrote a positive article on him.

14.New Mexico
Pete Domenici,76, incumbent

Declared Democratic candidates
1.Jim Hannan,57, CPA and Finance Director of Santa Fe Community Housing Trust, Former Mo Udall staffer, Former Chair Sierra Club of New Mexico, 1996 Sante Fe City Council Candidate

2.Don Wiviott, 52, Real Estate Developer, B.A- Government and Environmental Studies, M.B.A

3.Leland Lehrman,38, Freelance Journalist and Alternative Newspaper Publisher and Website designer

More prominent Democrats seem to be waiting to see whether Domenici runs again or not. Even though Domenici was possibly tied in with the U.S Attorney firing scandal, most Democrats in the state still seem to be supportive of him.  Of the present field, Wiviott is likely the front runner as he has some ability to self finance (he recently donated his campaign $400,000.) Jim Hannan is going after Wiviott for having recently donated to at least one Republican candidate.

15.Oklahoma
James Inhofe,74, incumbent

Prospective Primary Challenger
Stephen Wallace

Declared Democratic candidate
1.Andrew Rice,35, Executive Director Progressive Alliance Foundation, former Documentary Film Producer, M.A- Theological Studies, State Senator 2006- and Health and Human Services Committee Co-Chair

Prospective Democratic candidate
1.Kenneth Corn,32, B.A- Political Science, State Senator 2002- and Caucus Chair, former State Representative 1998-2002

Andrew Rice is the clear choice of the netroots, but it seems some Democrats in Oklahoma are concerned with his unabashed progressive views and what that could mean with him running at the top of the ticket (except for President).  I would be surprised if he didnt' face a primary challenge.  I'm not sure much about Kenneth Corn's views other than he is a member of the NRA.

16.Oregon
Gordon Smith,56, incumbent

Prospective Primary Challenger
1.Bill Sizemore, 1998 governor nominee, anti tax activist

Declared Democratic candidates
1.Jeff Merkley,52 President World Affairs Coucil of Oregon, former Non Profit Organization Director of Housing Development, Masters of Public Policy, State Representative 1998- and State House Speaker 2006-

2.Steve Novick,45, Pyramid Communications Senior Project Manager, former EPA Lawyer, Former State Senate Democrats Chief of Staff

3.Pavel Goberman, fitness instructor, frequent candidate

This appears to be the final field. All other prospective candidates appear to have dropped out. Public Radio Talk Show Host Jeff Golden announced he wasn't running on August 16, State Senate Majority Leader Alan Bates said he wasn't running on August 4.  Paul Evans, the Governor Kulongoski Emergency Prepardeness Advisor is part of a group called Vets for Merkley (or named something like that), while Medical Device Manufacturer Ty Pettit, who was running, dropped out and also endorsed Merkley.  Finally, Eileen Brady, a cofounder of organic food store chain New Seasons Market has been appointed to a new Health Board by Governor Kulongoski.  I wonder if Republicans have made anything of Governor Kulongoski, who is a co-chair of Merkley's campaign, removing a prospective primary opponent to him by giving her an appointment.  On the Republican side, Bill Sizemore could be an useful primary challenger for the Democrats. On the other hand, he could help Smith emphasize his alleged 'indepedance' from Dumbya.

17.South Carolina
Lindsey Graham,53, incumbent

Declared Primary Challengers
1.Tim Carnes,50, Systems Analyst and Baptist Pastor, P.H.D- Computer Resources and Information Management
2.John Cina,60, Electrician, Retired Air Force Vet

Prospective Primary Challengers
1.Andrew Bauer, 39, Lieutenant Governor
2.Jeff Duncan,42, State Represntative
3.Tommy Hartnett,66, former Congressman

18.Tennessee
1.Lamar Alexander,68, incumbent

Prospective Democratic Nominees
1.Mike McWherter, 53, Laywer and Family Beer Distribution Business CEO, First State Bank Vice Chair, son of former Governor
2.Kevin Doherty, 48, Insurance Lawyer
3.Bob Tuke, Lawyer and Firm Partner, former State Party Chair, Vietnam Marine Vet

Prospective Democratic nominees that are not likely to run
1.Rosalind Kurita, State Senator and Speaker Pro Tem
2.Kim McMillan, Former State House Majority Leader
3.Bill Purcell, Nashville Mayor

Mike McWherter seems to have been given a clear shot at the nomination.  Both Doherty and Tuke have said that they won't run if he does.  McWherter seems to want to run but is concerned that state 'favorite son' Fred Thompson will be at the top of the ticket.

19.Texas
John Cornyn,56

Prospective Republican candidate
Larry Kilgore

Declared Democratic nominees
1.Rick Noriega, 45, Center Point Energy Marketing Manager, Army National Guard Lieutenant Colonel, Masters of Public Administration, State Representative 1998-

2.Mikal Watts, 41, Lawyer

3.Emil Reichstad,59, Lawyer and former Army JAG Officer

Potential Democratic candidate
1.John Montford, President Southwestern Bell, former President Texas Tech University, former State Senator

Potential Democratic candidates who are not likely to run
1.Bill White, Mayor of Houston
2.John Sharp, former State Comptroller
3.Barbara Radnofsky, Lawyer, 2006 nominee
4.Henry Cuellar, Congressman
5.Jim Turner, former Congressman
6.Kirk Watson, State Senator and former Mayor of Austin
7.Mark White, former Governor

All of the above 7 names had been floated prior to Noriega and Watts declaring and I think they simply haven't officially said they're not running.  Rick Noriega is the run away candidate of the netroots (he's the #1 backed candidate on the fundraising site Actblue), however Mikal Watts earned $40 million last year and has donated his campaign $3.2 million for the primary.  Noriega just recently got the endorsement of several prominent former Democratic elected officials.

20.Virginia
John Warner retiring

Prospective Republican candidates
1.Tom Davis, Lawyer, Congressman
2.Jim Gilmore, former Governor 1997-2001
3.Bob McDonnell, State Attorney General
4.Bill Bolling, Lieutenant Governor
5.George Allen, former U.S Senator

Prospective Democratic Candidates
1.Mark Warner, 53, Lawyer and former Managing Director Columbia Capital Corporation (Venture Capital or Investment Bank firm), 1996 U.S Senate Nominee, former State Party Chair, former Governor 2001-2005

On the Republican side, Tom Davis and Jim Gilmore seem certain to run. All the other potential candidates, including Democrat Mark Warner, have mentioned that they won't announce whether they'll run or not until after the legislative elections in November.  On the Republican side, the nomination could be chosen either by convention or primary.

21.Wyoming (Special Election)
John Barrasso,55, appointed incumbent

Prospective Primary Challengers
1.Cynthia Lummis, former State Treasurer
2.Matt Mead, former U.S Attorney
3.Randall Luthi, former State House Speaker

Prospective Democratic Candidates
1.Mike Massie,54, B.A- Education, M.A-History, Economics Minor, State Senator 1998- and Minority Caucus Chair

2.Paul Hickey,58, Lawyer and Firm Senior Partner, B.A- History, 2002 candidate for nomination for governor (2nd place finish), son of former Governor

Prospective Democratic Candidate who is not likely to run
1.Dave Freudenthal, Governor 2002-

Wyoming
1.Mike Enzi,64, incumbent

One overall interesting thing to me is that nearly half of the Republican incumbent Senators could be facing competitive primary challenges.