"Faithless Electors" usually aren't trying to change the outcome of an election. Often it's just a "favorite son" thing.
The Republican Electors were selected by the McCain camp, not by Palin's people, are going to loyal to McCain. A switch to Palin isn't likely since the McCain & Palin camps don't like each other at all.
If a switch of that sort does occur it's more likely to be on the winning side, an Obama elector voting for Hillary Clinton (not necessarily as a protest but instead to make her the first woman to receive a vote for President in the College, if it hasn't happened before).
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"If they can't picture me with a knife, forcing them to strip in an alley, I don't want any part of it. It's humiliating." - windsock