Conversation so far:
What were the regular segments of the Bloggingheads.tv show?
There is a frequent diavlog between the two co-founders of Bloggingheads.tv, generally related to politics in some form, that usually occurs on either Wednesday or Thursday.
Who were the cofounders of the Bloggingheads.tv show?
The two co-founders of the Bloggingheads.tv show are Robert Wright and Mickey Kaus.
Did the Bloggingheads.tv ever have featured guests?
Yes, several events and personality appearances on Bloggingheads.tv have led to larger than usual amounts of media coverage.

Question: Any example names?
Self-contained rewrite: Any example of featured guests on the Bloggingheads.tv show?