www.mindplaces.com/darkmod -website
www.modetwo.net/darkmod -forums
We are currently looking for 3D modellers. The aim of this mod is to re-create a Thief-style environment in Doom 3, so that people can make fan missions for a nice-looking, modern Thief game. There is a petition for a Thief 3 editor, but it has so far been unsuccessful, and people want to show Eidos that they will make their fan missions anyway (as Looking Glass allowed with Thief 1 and 2).
Anyway, check the website for more specific info on the modelling posts.