re: Do we have a new Joe the Plumber?

I think you are misconstruing terms. Small l libertarianism typically refers to the philosophy, big L Libertarianism refers to the party

Nope. You are missing the point. I'm referring to what is essentially a school of Conservatism, people who identify overwhelmingly as Republicans, who call themselves "small l Libertarians". But they aren't "really" Libertarians, because Libertarianism is essentially a debating club of super-smart guys who are nowhere near the levers of governance. As talked about by WFB, Russell Kirk, Limbaugh et al. Coined thusly by Milton Friedman:

“I am a libertarian with a small 'l' and a Republican with a capital 'R'. And I am a Republican with a capital 'R' on grounds of expediency, not on principle.”

That describes most of the Conservatives on this board, no? At least how they/we would like to think of themselves.