I installed drupal on my own computer and here's the thing I would like to propose:
http://yapb.bots-united.com/images/117.jpg
all hosted sites are listed in the "Hosted Sites" section, and the "Bots For:" section can be placed with a list of games, clicking a game can lead the user to a list of bots for that game.
The "Links" section will provide all of the articles (such as the Mission Statement, Forum Rules and other stuff) in the current homepage (maybe "About Us" or "About Bots-United" is more accurate for these stuff?).
I changed the "User Login" into "Admin Login" and moved it from the up-left corner to down-right corner to avoid confusion (if not planning to integrate the system with vbulletin).
the template is one of those shipped with drupal, not sure if there are better-looking ones. But I think the color matches
Not sure if anyone has comments or improvements on this