Nobody really expected Wii Fit to be a flop, and obviously the rampant success in Japan should've tipped us off, but it looks like the little exercise-centric peripheral is really doing alright for itself over in Europe. Dixons.co.uk says it sold a Wii Fit every four seconds on Friday, and Amazon.co.uk says they sold out within 24 hours. No word on overall sales yet -- they've sold over 1.8 million units in Japan since the December launch -- but we'd recommend you get yourself a preorder or a nice spot in line if you plan on working that flab off anywhere near the May 21st launch date in the US.