While I'm pulling for Obama, I'm voting Libertarian in hopes that we can eventually get some other option on the ballot.
If your pulling for Obama, you shouldn't throw away your vote in possibly the most important state in this election. Furthermore, voting independent candidates for president will have ZERO impact on changing the two-party problem we have today. You would be much better served by voting and volunteering for independents in down ticket races where such a candidate could actually win.
Only when we elect significant numbers of independents from the bottom-up, will we see a serious challenger for president.