I know the 2007 Amnesty Bill didn't come up for a vote in the House. Here are some links to sites that show potentially competitive districts:

Top Ten Most Expensive House Races 2008:
http://www.opensecrets.org/overview/topraces.asp

Race Ratings (scroll down a page.)
http://en.wikipedia.org/wiki/United_Sta ... ns%2C_2008

These races look like there might be GOP Primary worth investigating:

AZ 1 Renzi retiring
FL 16 Mahoney D
IL 11 Weller retiring
MN 3 Ramstad retiring
NJ 3 Saxton retiring
NJ 7 Ferguson retiring
NM 1 Wilson retiring
NC 8 Hayes R
OH 15 Pryce retiring
OH 16 Regula retiring
NY 25 Walsh retiring