Oh yes this is certainly one of the big ones I'm waiting for. it will be just as user modifyiable as Oblivion was / is, so that means a whole community of people creating stuff that will enable us to enjoy the game longer. New levels, new monsters, weapons, quests, addisiotns to the storyline... you name it, it is possible with this editor. The editor i'm refering to is the construction set that will be released together with the game. Oh man I can't wait for some post nuclear RPG gaming ... bring on the mutants !! I've got my sawed off shotgun locked loaded and ready to kick some ass... meanwhile, check out Fallout 3 mods community site here. Get a head start on the modding scene right now and be there with the first releases of the mods. They just posted a preview with a release date .. it's really coming this fall !!!
More to come soon ... stay tuned for the latest in Fallout 3 modding news.