Ok. Idea:
Divide the forum's active members (Within the past month) into two teams (Two admins per team for obvious reasons)(Non-active members can either be on neither team or both teams).
Two new forums are created, one viewable to each group.
In the forum, a new game of some sort is created. That'll be the only topic.
The two teams then get into a race to see which team can get more posts in their game in a certain time period. Whichever team gets the most posts gets some kind of award!
Thoughts?
