ASDA will be selling both the black and white versions of the Wii console for £99, but only in stores open on New Years Day, as far as I'm aware the deal does not go past that day.
The two versions on offer are the Nintendo Wii Black Console Bundle including Mario Kart Wii, Black Steering Wheel, Wii MotionPlus, Wii Sports and pre loaded DK game, and the White console including Wii Sports, Wii sports Resort, and motionplus.
Granted limited to a few stores but a good offer for those with a ASDA open.
1) Enter town or postcode here http://storelocator.asda.com/
2) Click on your store
3) Then click on "Christmas opening times" to check if they're open on New Year's Day
Note: Does not include Mario Kart or Steering Wheel.