Are you implying that a Third Party to the left of the LIEberal/Socialist/Marxist Democrat Party might come into national prominence in '08?
I don't think that particular scenario will come to pass.
I do think that '08 might be fertile ground for a true conservative Third Party, however. But we must be "vewy, vewy careful." A well financed, very strong, very charismatic third party conservative could win in '08, IMHO.
But, it has to be done correctly or, we'll wind up replaying the '92 election.
I.e., a third party got us Bill Clinton in '92.
Hitlery is hoping a third party (of the conservative persuasion) comes into play in '08.
We must be damn careful to avoid repeating that particular piece of American History!