The terrific polling site FiveThirtyEight.com has a characteristically terrific post on the debate. Especially worthy of note:

McCain’s essential problem is that his fundamental strength – his experience -- is specifically not viewed by voters as carrying over to the economy. And the economy is pretty much all that voters care about these days.

EDIT: The CBS poll of undecideds has more confirmatory detail. Obama went from a +18 on "understanding your needs and problems" before the debate to a +56 (!) afterward. And he went from a -9 on "prepared to be president" to a +21.

A 56-point gap among undecideds on "understanding your needs and problems." Pundits second-guess Obama's "coolness," but his emphasis on the middle-class and their economic insecurity -- rather than, say, the corrupting power of earmarks on members of the U.S. Senate -- connected with voters not necessarily predisposed to identify with Obama.

Another reassuring finding: FiveThirtyEight's models predict that Obama has "a 78.5 percent chance of winning the election"; and "We are now close enough to the election where every day that goes by without McCain making gains in the polls makes him marginally less likely to win. So Obama's win percentage will be ticking up by perhaps half a point a day based on inertia alone."