Quinnipiac is out with a new national poll on '08:

Democrats
Clinton 38
Obama 23
Gore 11
Edwards 6
Undecided 13

(Updated RCP Average on Dem Nomination here)

Republicans
Giuliani 40
McCain 18
Gingrich 10
Romney 7
Undecided 15

(Updated RCP Average on GOP nomination here)

Head to Head Match Ups
Giuliani 48 - Clinton 43
Giuliani 47 - Obama 40
Giuliani 48 - Edwards 40

McCain 46 - Clinton 44
McCain 43 - Obama 43
McCain 43 - Edwards 42

Romney 37 - Clinton 49
Romney 29 - Obama 49
Romney 32 - Edwards 48

(Updated RCP Averages on Head to Head Match Ups here)