There's a grassroots group with a Web site and Facebook page promoting the idea of former New Mexico governor Gary Johnson running for the Republican nomination in 2012. And yes, they're even selling "Johnson for President" T-shirts, ball caps, etc.
What's even more interesting to me is that Johnson himself is about to start a 527 group which will have a Web site for Johnson to promote his ideas on issues. Don't forget that the main purpose of a 527 is to raise tax-exempt money.