Instapundit linked to this anecdote which is...encouraging. Note the source is The Atlantic. From their past history, we can safely assume that they aren't repeating conservative talking points.
I'm a student at Carleton College who has contributed (financially and with my time) to the Obama campaign. I just got an automated call from Jeff Blodgett, the chair of the MN campaign. The text of the call was:If Minnesota is really close, is it a Franken effect? Or more general? What does that say about Wisconsin?
"Hello, this is Jeff Blodgett from the Minnesota for Obama campaign. Our initial data shows this election is significantly closer than the polls predicted. We are putting out an urgent call for volunteers... We are organized groups to knock on doors at five P.M., or earlier if you can, for our final GOTV operation."
This was followed by different numbers to call based on your residence.
Personally, I'll believe Minnesota is in play only after ABCCNNMSNBC grudgingly calls it for McCain. But until then, that automated call transcript certainly is interesting.