This isn't on the English Nintendo site yet, but the Japanese site has information about the Wii Classic Controller. For games that don't use the new Wiimote with its motion sensing capabilities, or for people who aren't keen on going Nunchaku with the two handed version, we have the SNES-like classic.
Featuring four face buttons (y, x, b, a), select and start, two analog sticks, a d-pad and four shoulder buttons, this Wii controller should feel right at home to anyone who's played a game in the last two decades.
Wii [Nintendo Japan]