Hmm... you looking for a specific game, or just looking for linux users who game?
It almost sounds less like a guild and more of a repository of info, but I might be getting you totally.
Once I find a distro I want to go with and get it running on the desktop I might look into trying to game more. I ocassionally play Guild Wars and Wolfenstein ET, but not as much lately. Schools and finding a distro has been keeping me busy lately.