Joi Ito talks about Powerpoint Karaoke, which is being played at 23C3 (which I really wish I was at). The game is:
"You get up. They cue up a random presentation. You ad lib it. "
Terrifying. But I imagine that it's a riot. Perhaps we can get them to do this one at Blackhat. (For those that didn't hear, registration for Vegas 07 is now open)