"Nintendo"s exercise game Wii Fit is still flying off retail shelves eight months after its U.S. release last May. The all-in-one instructional tool, weight tracker and fitness coach advertises itself as a painless way for the whole family to get healthy thanks to the game"s "balance board," which measures players" movement. Offering a selection of activities--from running to push-ups to yoga--Wii Fit is now in almost 1.5 million homes across the country. But is anyone actually using it?"
