Right now we have a contest going on for societies to be put into a supplement. If you'd rather not have yours considered for inclusion, please put that information somewhere in your post. Please use the folder for that contest if you'd like be considered for it. It's under "Challenges & Contests."
Societies based on other people's work (e.g. one based on the gamesmen from Ian M. Banks Player of Games) are definitely welcome here, but are disqualified from the contest thanks to intellectual property rights.