This looks to be the cheapest around at the moment!
Nintendo Wii in Black at Toys R Us
This is a pre-order online. Not sure if you can get it at this price in store when it's released, however the white Wii is the same price when I checked in store yesterday.
Wii Console in black
1 x Remote Controller in black
1 x Nunchuck in black
Wii Sports Resort with MotionPlus