CQ has an interesting list of 25 vulnerable House seats for Republicans and 25 vulnerable Democratic House seats. Many of the House seats--on both sides--were decided in 2006 by a few percentage points. It seems like one of the noteworthy questions of the 2008 House race will be to see how safe many of the newly-elected 2006 Democrats are in their incumbency--though the GOP is also looking at some seats whose holders were not first elected in 2006. Democrats seem to have their eyes on a number of Republican House seats in New York, Ohio, and Pennsylvania; Republicans may hope to gain a number of seats in Indiana, and it doesn't look like they intend to give up New York and New England (they seem to have their eyes on seats in Connecticut and New Hampshire)--they also have their eyes on seats in NM/AZ and Georgia.