If anyone's going to get a workout from Wii Fit, it's going to be Nintendo's marketing department. According to Michael Pachter, Nintendo is preparing the "biggest marketing campaign in its history" for the North American release of Wii Fit on May 19th. He deduces that all of these marketing dollars won't be wasted on GameStop alone, but will be aimed instead at promoting in (and with) more mainstream retailers Target and Best Buy.Besides causing you to see Wii Fit freaking everywhere, this push will have a positive effect on the gaming world in general: according to Pachter, Nintendo will start increasing American Wii shipments by about 150,000 units a week. If you don't have a Wii yet, you can get some early exercise traipsing back and forth to Target for the next few weekends!

