The crucial moment, for me, came late '06 & 07, when I eventually discovered RP after swearing off voting for democrats & being in political limbo. Seeing him in the debates sealed the deal, more or less.
I definitley agree that the only real useful political means that libertarians could serve in mainstream politics is education & spreading the word, as, without them (and the communities & political thought they showed the door to), I might not be where I am today, and probably would be an Obama-bot right now.
I went from being a soft-paternalist, then civil libertarian, after that, a vulgar libertarian (minarchist, for the past 2), & currently: an apolitical libertarian, w/ market-anarchist, objectivist (very mild; only just starting the virtue of selfishness), & technorealist (douglas rushkoff, howard bloom. e,tc.) influences.
Yeah, it's been an interesting 1 1/2 almost 2 years.