Pennsylvania

McCain has been doing better there, especially in the West of the state - surprise!. Silver:

The Pennslyvania polls have probably tightened by more than one point, although it is important to note that the four polls that show the state in the mid- single digits (Rasmussen, Mason-Dixon, ARG and Strategic Vision) have all had Republican leans so far this cycle. Pennsylvania is still an extreme long shot for John McCain -- Obama is more likely to win Arizona than McCain the Keystone -- just not quite the long-shot that it had looked like a couple of days ago.

That's worth absorbing as a statistical likelihood:

Obama is more likely to win Arizona than McCain the Keystone.

You can see a graph of all the Pennsylvania polls here.