Rick Johnson, Lead Programmer @ Ravensoft updated his .plan file with following information:

Based on feedback we received at the mod maker round table sessions at QuakeCon, we created a private forum for mod makers. This forum is a place for all mod makers of all engines / games (not just Raven games) to come and discuss any issues associated with mod making, such as programming, scripting, mapping, modeling, textures, sounds, etc. This forum is only open to people actively involved in making content. If you wish to join, create an account on our forums and then email me with your account name and I’ll give you access. There is also a small website associated with this whole endeavor. Again, this is for all people making mods for all games / engines.