It's this 28-JUN-2012 at 9:00 San Fransisco / 12:00 New York / 17:00 London / 18:00 Brussels.
Watch it live on TWiT (at that time).
There's also a chat from which the hosts take live questions: irc.twit.tv channel #twitlive
Update: the interview has been moved from Wednesday to Thursday and half an hour earlier.
