Democracy Corps. does the most extensive post-debate poll, using a sample of over 1,000 likely voters. Apparently, their poll has Kerry moving up two points as a result of his strong debate performance last night. Also, there's this from the Democracy Corps. release:
Independents--By 11 points, they said Kerry won the debate (44 to 33 percent)
Undecided--They gave Kerry a 9-point edge (39 to 30).