Creative Conclave
   A collaborative effort to create an original fantasy world for use in role-playing games and writing.
   http://forums.delphiforums.com/splendour/

Yahoo! Groups: rpg-tools
   Mailing list and group to share information about tools useful to people creating imaginary worlds and using them for storytelling, writing, roleplaying or wargaming.
   http://games.groups.yahoo.com/group/rpg-tools/

Yahoo! Groups: world-create
   Forum for world creation and development.
   http://games.groups.yahoo.com/group/world-create/