I don't know that he has the nomination of the Libertarians. Most 3rd parties don't have nominating conventions until summer or fall.

The Greens would never nominate Clinton. There is, last I heard, still a two way race for the Green nomination, but it is likely to end up being Cynthia McKinney, whom I would definitely vote for, as their nominee.

The more high profile candidates running for third parties and drawing attention to election reform, the better as far as I am concerned.

The two party duopoly needs to go. It is so corrupt it can't be reformed. And it is quite clear their candidates and nominees aren't very good at governance, either.

Which is why it is so stupid to keep voting for them, just because they represent the mainstream elite.

Bob Barr was a Gingrich Republican--came in at the same time, IIRC.