I have a couple of suggestions to inproove the forum
1. A Karma system (aka member rating)
This is very easy , when someone does something helpful to the forum , he gets 1 Karma star (they are like warning stars , but positive)
Its a good way to rate members.
2. Post wrappers
I think members should be able to customize they're posts more. A post wrapper is a little section added in the profile where you can select what color , style , font etc your post should have. Mostly useless but fun
3. I was thinking about a shoutbox.. but that only works well on smaller forums.
4. Gang Icons
Official gangs should have a icon to represent them and each member should have the icon in they're member group. This way it will be easy to see what gang a member belongs to and will make things cleaner.
Just my two cents.. please comment on my suggestions