This is a great idea.  Are you planning on having just one game or expanding to have several games playable through the wallet?  Different versions of the same game would be a cool idea for the community.  Maybe taking the main idea and making an RPG, an MMORPG, a FPS, a RTS all based on the same storyline and game concepts as part of the wallet would be great.

Am I the only one getting a virus alert from the "arkenstoned.exe" file?