Bret wrote a good post discussing the impact - or lack thereof - of the President's healthcare speech before he delivered it last week. While it is too early to tell what if any impact that speech has in fact had on the healthcare reform debate in Congress, several polls since the speech have measured a notable bump in the President's approval rating, both generally and for healthcare reform specifically. You can find the most recent poll, conducted by CNN/Opinion Research, here.
UPDATE: Shorter Nate Silver: the American people are confused. (h/t Bret)