CBS:
Who won?
McCain (R) 27
Obama (D) 39
Draw 35
Will Obama will make the right decisions on the economy?
Before debate: 54
After debate: 68
Will McCain will make the right decisions on the economy?
Before debate: 41
After debate: 49
Victory also looks like this.
Update: To emphasize: less than half of undecided voters think McCain will do the right thing on the economy, over 2/3rds think Obama will.