One of the best elements of the Nintendo Wii is the unique set of controllers. Not only that, there have been aftermarket attachments that turn the controller into a more-realistic racker, for example. Yesterday(11/19/07) Nintendo released the Zapper, a controller shell for both the Nunchuk and Wii Remote that looks like, well, what do you think it looks like?
The Zapper ships with a game, Link’s Crossbow Training, which is really a training ground for use of the Zapper, though it is derived from The Legend of Zelda: Twilight Princess. You play as Link in 27 mini-games which fall into two genres: target practice and protecting Link from enemies.
Nintendo plans to come out with more controller shells.