A commenter below asked about a new Mason Dixon poll showing Obama up 47-44 in Virginia but suggesting that the undecideds are a McCain leaning lot:
"Among undecided voters this year, 93 percent are white and 75 percent live outside Northern Virginia, where Obama has a substantial lead."
My first reaction is that it is highly unlikely that 9% of likely voters are still undecided. I think a lot of folks who still don't have their minds up just aren't going to be voting. There are probably some conscientious people who feel a civic obligation to vote and are genuinely torn but for the most part if you still don't have a dog in this fight I don't think you're going to turn out.
My second reaction is that this poll had a sample size of 625 people so you're generating a profile of undecideds based on like 57 respondents. That's a pretty darn high margin of error.
I'm having a hard time detecting any overall trends in our last round of polls. In some states it seems like Obama is doing better, in some a little worse, in others about the same as both our recent polls and those of other organizations.
We'll finish field work and start rolling them out late tonight.