When you watch the video embedded above, you may think it's just another weird hack by people with too much time on their hands. But right about the 00:44 mark, suddenly you see the potential: working off that World of Warcraft bulge!
Yes, these enterprising souls have managed to turn the Wii Fit balance board into an alternative method for traversing the Azerothian landscape. Of course, the health benefits are mitigated by the fact that there's no way you'll be able to balance on the board while trying to manipulate a keyboard at the same time, even if you are a macros master. But if you're desperate for some sort of exercise and can't abide the thought of actually going outside, this might be the device for you.