A major part of our vision for Exploit: Zero Day involves lively discussion and roleplaying among players. When registering for the game, you pick a hacker handle and automatically have a forum account created for you — the forums are just another part of the game.
In the spring, when our first relatively large batches of folks got access, we saw some awesome roleplaying and player-created story and puzzles. That's since trickled off, and the forums have more site updates and bug reports than anything else.
Why the desire for forum content? There are a couple of reasons.