I'd suggest a Fallout forum.

As for regular mods, I see no reason NOT to have them. It would allow people to make the new sub-forums more active. For instance, with a Fallout forum, if you make Vault Dweller the mod of said forum, he can sticky posts, move posts as needed, etc, stuff that supreme mods might not do in said forum. For example, I don't do any moderating in the RPG-maker forum, so having a mod for that forum would be a good idea(except Lenny probably covers that forum pretty well.)