My 2 thoughts since you asked.
1) as I said earlier, I almost never listen to podcasts, so I don't really care to much, but I love to talk so I wouldn't mind having other people listen to me.
2) My one concern is that getting together just to talk videogames could easily lead to a mess of a podcast. If there were specific questions and topics and an organized flow I think it would go better, and I'd personally be more willing to participate.
edit: oh, and I voted 6 just because