I'm seeing the same thing here as far as moderate Democrats go, however I am also seeing Republicans who are very disappointed in Bush, with "non-amnesty" amnesty being the final straw. Most are saying they will sit this election out. Ofcourse, the election is still a long way off and things change.
A very small but vocal crowd on FR. Same thing happened in 2000 when the Buchananites posted all the time. Pat got 0.3% of the vote in 2000.