It's interesting to note that in recent polling, despite the overall lack of coverage for his candidacy and his party, former Republican and current Libertarian Presidential Candidate Bob Barr is appearing on the political radar.
It's notable that Fox News and talk radio doesn't talk about Barr, because they know that Barr will and does take voters away from McCain. So, even talking about him to disparage him in the way they do Obama, even that is a no-no, because Barr has some latent support from his time in Congress.
I think Republicans could do worse than vote for Bob Barr, as a protest against the neo-con takeover of the Republican Party.