Sorry ethic, your game will have to wait. After talking with one of my friends I got inspiration for a great Wii game.
Lawn Darts.
That's right, the game that's been outlawed in some countries. I figure it would actually make a pretty good Wii game because it can be multi-player and utilize the Wiimote features pretty well. Other games could fork off the engine too, like bocce ball, horseshoes, etc.