What are the odds of a "faithless elector" in this election?

There has been 1 in each of the last 2 presidential elections.

So if somehow the vote is tied at 269 each, some knucklehead could throw the election to the other party.

What is more likely is that a McCain/Palin person makes a symbolic vote in defeat - like flipping the votes and giving Palin the 1st vote for a woman as president - thus marking the way to a 2012 run like some guy did for Reagan in 1976.