http://www.electoral-vote.com/.
Updated daily, using state polls. Plus it has listings of the Senate and House contests.
I didn't feel the need to add the LJ feed to my friends list, but there is one:
electoralvote.
On a related note: After listening to some post-GOP convention interviews, I have one question: who are these people who claim that they were for Senator Clinton, but now are for Governor Palin? I'm tempted to claim that they are shills, but do any of you know anyone who has actually claimed that who doesn't appear to be a liar? Because the similarity of Clinton's and Palin's positions seems to have escaped me.