SLUG Meetings being narrowcast and then published on youtube (this talk at 16min). The last meeting experimented with interactivity via IRC, Twitter and the live audience. There is a 30 second delay on the video, which makes interaction via IRC and Twitter difficult.
Current meeting Format - 5 minute pitch on favourite topic or event
So what format meetings of the future..meet to continue mailing list discussions, show and tell new gadget or just chat OT.