Apologies, I just found this thread.
I second the notion that voting for a 3rd party candidate is
not wasting your vote. What
is wasting your vote? Voting for something you don't support or believe in.
*edit*
For the record, I'm a registered libertarian but as pointed out in this thread -- that can vary, and I don't support many of Bob Barr's ideas. So, I wrote in Ron Paul
