The news hounds at DAA are following the 2010 mid-term elections at this link on the New York Times:

http://www.nytimes.com/politics

It has an excellent graphical overview of the entire country by House, Senate and Governors. Click on your state or district to follow up who is up and who is out. As of today, there are 104 seats in play in the House, with 55 of them leaning Democratic, 31 too close to call and 18 leaning Republican. In the Senate, there are 18 seats in play, with 5 leaning Democrat, 8 are too close to call and 5 are leaning Republican. Democrats cannot fall asleep at the wheel here – stay informed, make sure to reregister (see below) and remind your friends and family back home to vote for Democratic candidates.