Folks, remember what I said Friday evening. Do not trust Halloween night polling. Even if it is correct or shows a pro-McCain result (which it is unlikely to considering who is out). I've been reading up a bit on Zogby's polling practices, and my sample today is partially Halloween night polling, so there.
I disagree with the assessment that Halloween would be a good night for Obama generically. A lot of adults with children will be out, but a lot of young adults will also be out (as Halloween has increasingly become a holiday for 20 and 30-somethings as well as children). Plus, Halloween means vacationing for the weekend is much less likely.
Don't know why, but Halloween was a good night for Obama. Saturday was a great night for McCain.