My unsolicited take on the 2012 Senate Races:
Likely to very likely GOP Pickups: Montana, Missouri, Nebraska, North Dakota.
Possible GOP Pickups: Connecticut, New Mexico, Wisconsin. I’m least confident about Connecticut, but it’s a possibility, IMHO.
Longshot GOP Pickups: Hawaii. Lingle probably has the best chance to win this seat any Republican ever has had. She’s liberal on social issues, but ought to be far better than Akaka on other issues. I’ll take “half a loaf” in a deep Blue state like Hawaii.
Possible GOP losses: Massachusetts, though I think Brown will ultimately prevail. Maine. Indiana if Lugar is defeated in the primary. Mourdock is a real conservative and worth the gamble, but it’s also realistic to assume he’ll have a tougher road to the general than Lugar, who has clobbered every Democratic challenger easily over the years. Donnelly could win here, though it’s anything but a sure bet.
Whoops, forgot Virginia. I figure it with an edge for the GOP, though not a sure lock.
You forgot PA. Good chance the milk-carton senator can be removed.