Chats and Forums

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

Fantasy World Builders Forum
Fantasy world builders discussion about deities, races, geography, curious characters, classes, and locations.
http://www.angelfire.com/rpg/fwbforum/

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/