What would be funny (although I hope it won't have to come to this), would be for Bush to win all the states he is predicted to win but lose either West Virginia or Nevada. That would result in a 269-269 tie and the Republican House would elect George W. Bush. That would really make the liberals mad. And it's not totally unlikely to happen. It very well could. However, I do hope that after the RNC, Bush will open up a large lead.
Might result in a tie. Maine doles out it's electoral votes by district -- it is possible for one person to get 3 and the other to get 1 in Maine. I think there may be one other state (nebraska?) that also does that with thier Electoral votes.
It is also possible for an Elector to "switch" his/her vote though extremely unlikely.