Fishing the River Wii

Nintendo has released its latest gaming system, The Wii, with a unique controller that turns your hand motions into game movements. There are already games that make use of this controller to simulate fishing but so far I have yet to find any mention of a fly fishing simulator for the Wii. It would seem to me that this would be the perfect platform for such a game that could help an angler practice their casting stroke during the cold winter months.