I think for a Wii game to be rare, it can't really have any brick and mortar retailer distribution. Anytime you see a game at Best Buy, you know they have ordered a minimum of several thousand copies. I really doubt there will be any "rare" games for the Wii at this point. Maybe down the road as shelf space becomes tighter and tighter, but almost every game I know of is being picked up by most brick and mortar retailers at this point, even the games that the buyer must have known would be terrible (Anubis II, Ninjabread Man, etc...).