I am tempted to say Only in America, but then again, that's not quite true. Anyway, have a listen into The Guerrilla Radio Show, a weekly philosophy talk show with jingles, bells & whistles! I like their motto: Waging war against idiocy. Technically, it doesn't quite qualify as a podcast, yet, but apparently they're going to provide an RSS feed really soon. Check out the current show on political philosophy, containing an introductory discussion of John Rawls.