I made a new world in a google spreadsheet. Users can decide the content and using the google functions and gadgets you can link between data in the spreadsheet and also outside. That means you can also risk that other users dont like the things in the main sheet, but with a link to something you create on your own you decide which rights visitors should have at your spot. I consider it kind of a game world. However you can say its just a creative chat room, where you dont even have a real avatar, since you can edit the spreadsheet without having an account.
http://spreadsheets.google.com/pub?key=pLLRYWcIP5owj84JcHz3ZJQ
