I wonder if those wishing for a 3rd party might get what they wish for this year? But, be careful what you wish for.
It seems like Obama has the tide on his side to get the DEM nomination. I don't see Hillary willing to be his VP; even though they'd crush the GOP if she did. Instead, being stubborn and unwilling to quit "for the good of the party", she could run as a 3rd party candidate. Thus, in Perot-style, handing the election gift-wrapped to McCain.
btw - I'm voting for Hillary in the IN primary on May 6.