Quinnipiac has a new poll out on the 2008 Presidential Race. Note that the survey began Wednesday, April 25, the day before the Democrats held their first debate in Orangeburg, SC, and finished on Tuesday, May 1. On the Democratic side, both Clinton and Obama have taken a bit of a slide but still lead the rest of the pack, while Edwards got a solid bump:

Democrats
Clinton 32 (-6 points versus last month's poll)
Obama 18 (-5)
Gore 14 (+3)
Edwards 12 (+6)
Richardson 3 (+1)
Biden 2 (+1)
Undecided 15 (+13)

For the Republicans, Giuliani took a pretty significant tumble which looks to have been almost entirely due to Fred Thompson's appearance, because the rest of the field remained pretty close to static:

Republicans
Giuliani 27 (-13 points versus last month's poll)
McCain 19 (+1)
F. Thompson 14 (first time polled)
Gingrich 8 (-2)
Romney 8 (+1)
Undecided 16 (+1)

Head-to-Head Match Ups
Giuliani 49 - Clinton 40
Giuliani 44 - Obama 41
Giuliani 48 - Gore 41

McCain 46 - Clinton 41
McCain 42 - Obama 42
McCain 47 - Gore 41

F. Thompson 39 - Clinton 46
F. Thompson 34 - Obama 47
F. Thompson 37 - Gore 47

Favorable/Unfavorable Ratings
Giuliani 53/24 (+29)
Obama 46/18 (+28)
McCain 49/26 (+23)
Edwards 46/25 (+21)
F. Thompson 26/9 (+17)
Gore 49/41 (+8)
Romney 17/16 (+1)
Clinton 44/46 (-2)

Other numbers from the poll worth a mention: Democrats lead the generic ballot question by 9 points (43/34); 57% responded that Iraq is the "most important issue for the next President to deal with;" President Bush's job approval is at 35%; Congress' job approval is slightly higher at 39%; and the Supreme Court's job approval is at 58%.