Re: Lipstick Libertarians
Two resons for the libertarians on BH.tv:
1) The libertarian portion of the blogosphere has a consistency/tenor that fits well with the BloggingHeads culture. Blogging-tarianism isn't as much of a "movement" (or a "gang") as the right-wing/left-wing blogging worlds are. While everyone carries water for their ideas, internet "cosmotarians" (as opposed to "get your hands off my guns and beans") are less likely to be carrying water for a social group--which is where discourse gets compromised most powerfully.
BloggingHeads goes against the grain of standard political discourse... most people much prefer to group together and agree on how much they hate the other side. Differences get turned into hatreds and vendettas, etc. If you think about the number of people who are actually of the type to sit face to face (hah!) and hold an hour-length discussion without it degenerating into mortal insults, libertarians might be a greater portion than they are of the population at large. Again mostly because they don't have much of a "group" to be a part of, and are on the sidelines of the endless and ageless right-left battle.
2) A lot of Bloggingheads contributors have spread through blogger social networks, and a combination of chance/the topology of those networks have led libertarians into the fold.