I recently found this site I dont know who made it but its just for avatar fans. You can buy bending and other things and play games. Its very cool and i reccomend it. The only problem is you have to be using google chrome for the chatroom to work but google chrome if free and guick to download, so its ok. It has few members, but its new so that will change if lots of people from here join. They even have a special firebending game and boy and girl charecters for every nation, kingdom, or tribe! Link: link