Here are two new things that would make a great addition to these boards:
1. A chat room - Misho, myself, and a bunch of others have been talking about this for a while. It would be awesome if you could talk to other users that are currently online.
2. A "quiz" feature - This would make "What is it?" easier for me, and we could all post sweet quizzes. Wouter, I know you found that quiz hack already