I don't know how hard this would be to do, but how about a way to reorganize the forum list on the main page. It's not a big deal, just with all of the forums we have now it can sometimes be easy to miss the on I'm looking for.
Another option would be a customizable GT start page. You could have you favorite forums listed, stuff like that.
Like I said, not a big deal, just something that would be cool.