Minnesota may turn out to be the most promsing of all the "blue" states, barring perhaps the traditional McCain playground of New Hampshire. A recent poll shows McCain within 5 points there and Coleman regaining the lead for the Senate
http://hughhewitt.townhall.com/blog/g/688a8abb-f1a6-4ef1-a588-63fcb2b3bed1
Now MN's 10 EV's aren't PA's 21, but it still seems like PA is further out of reach than this despite immense effort brought to bear by the McCaniacs. Besides, Obama has pretty much thought MN was in his corner previously.
MN is also a state where Palin's outdoorswomen background could be expected to be a plus; besides she sounds like the police chief in this famous movie. http://en.wikipedia.org/wiki/Fargo_(film).
It will be interesting to see if McCain or Palin make any appearances here over the last week. Certaintly Norm Coleman and Michelle Bachmann could use the help in the final days.