kevin, libertarianism will continue an insignificant political modern-day phenomenon until your disparate comrades can create a coherent and consistent philosophy and platform.
I don't know about insignificant. When has libertarianism ever been more popular than it is right now? Never? That doesn't mean that libertarianism is dominating the conversation in the country, or anywhere close to it, of course, but it is certainly a part of the conversation at the highest levels.
Just a little anecdotal evidence, my American Political Theory professor, not a libertarian by any stretch, said he was considering adding Robert Nozick's "Anarchy, State, and Utopia" to his reading list in future semesters, obviously due to the popularity that libertarianism is gaining. Obviously nothing to write home about, but still a positive development I think.
Also, I think the trend for libertarianism at the moment is only upwards for the moment.