I'm going away to Uni in September - part of the reason we're doing it now is that I have no idea when I'll get another chance to organise an event this big for us to all do.
I will definitely participate in:
- Classical Slam
- Freestyle Slam
- Team Haiku (if I get some team-mates!)
- Poetry Contest
Possibly chess, RTW 1k/10k, 0AD, short story or oulipo, and scrabble, depending on how sign-ups go for other participants.
EDIT: And now we just hope that the other sites come up with the goods by way of participants.