There are quite a few FO modding teams out there, most of which want YOU to join them:
Russian:[]
TeamX - A Russian FO modding legendd [link]
Red Isle Team - A little known Russian modding team
English:[]
Mutants Rising - Headed by modding guru Chris Parks
Fan Made Fallout - A large well organised modding team
Team MIB88 - A one man army
Team Killap - Another one man army
Czech:[]
Fallout: Between Good and Evil Team
Resurrection Team
German:[]
FalloutNow! Team A new team [link]