Naysayers beware, for the tea party shall rise higher than the highest ant hill and it shall have believers flocking around it more than the flocking found at Garibaldi's Lamb Coat Factory.
Seriously, the Tea Party has a chance- slim it may be; but, a chance it still is, to grow into something of greatness. All political parties began somewhere and that's just the way it is- check your history if you have doubts. No, not just the young history of the United States of (North) America; but, history going back many centuries, look at all of it and learn.
Curiosity draws people in, some are taken with the ideas and join, others, are disgusted by the values the Teapers have and rant loud and long- which of course draws media attention and gets more people interested and hence more who join. It's a vicious cycling circle of crescendoing proportions. Then again, all political actions begin somewhere and go up and down, down then up and appear stagnant at times like the growths on the floors and hanging from ceilings in caves (don't be fooled by the appearance, there is growth even there).
The Democrats have retooled over time, as have the Republicans, which has spawned Independent and Green and Libertarian parties, which while weak, have their roots growing deep and steady.
The Tea Party is learning what is appealing and what is vile to the public and are building upon that- don't be surprised as their strength grows. Don't be surprised as they add to their 'minority' base.