Latest Bloggingheads up with Robert Greene, bestselling author of The 48 Laws of Power and most recently The 50th Law ("Fear nothing").
Excellent commentary/summary by Andy McKenzie here.
The most important piece of advice I got from The 50th Law was "always attack before you are ready".
BHTV is a very low-overhead operation. My understanding is that they want to be able to set up a diavlog between any two people in the world by just mailing a box with a video recorder and a mic to the participants.
ETA: They also want the participants to be looking into the camera, not off to the side at a screen showing their interlocutor. (Of course, many participants just stare off into space anyway.) The goal is to have something like those interviews via satellite that you see on TV talk shows. On those shows, the interviewee is usually just looking into a camera and can't see their interviewer.
Judging by the varying and often bad quality of video, they probably don't mail any video recorders, and by extension a microphone.