Along with Jan Erik Sandberg (founder of the Norwegian Extreme Programming Forum) I'll be running two Chalk and Talk sessions on Extreme Programming at TechEd Europe.  We're going to use a 'Fishbowl' format, sometimes described as a Park Bench Panel.  Ward Cunningham describes this format as 'very much like a wiki for people who happen to be largish in number and stuck in the same room’

Here's how the format will work: we'll start with a panel of speakers (James Newkirk will be with us for the first session at least) 'in the goldfish bowl' on chairs at the front of the room, along with one empty chair.  The rules are that those in the audience, outside the fishbowl, are only allowed to ask questions.  If you would like to say something then we'll encourage you to walk up and sit in the empty chair.  At this point discussion stops until one of the panelist leaves so there's always an empty chair.

Here's the blurb:

Are you interested in Extreme Programming?  Have you thought about starting an XP project?  Do you want to know what works, what doesn’t, what the risks are?  This Chalk-&-Talk is a great opportunity to meet with other interested and experienced practitioners.  We’ll use a ‘fishbowl’ discussion format – an extreme way of having an active group discussion described by Ward Cunningham as ‘very much like a wiki for people who happen to be largish in number and stuck in the same room’.
Wed 30 June 2004, 08:30 - 09:45 Room S
Fri 2 Jul, 16:15 - 17:30 Room S