Voting for Romney is the same as voting for a weak and ineffictive party machine. And they are laughing at all who do. Not me.
Third party movements have not done well in this country. They usually end up helping the other side as will be likely be the case this year, at least at the National/Presidential level.
Where the Tea Party has succeeded is at the local level and in the primaries. The next Congress will have a stronger Tea Party contingent and many state legislatures will be changed for the good. The Republican Party is being shaped by this movement, but from the bottom up and that's the best way to do it. Of course the great danger is that Conservative movement spends years in the wilderness following an Obama victory.