The Wii has done exceptionally well, though despite the stunning sales Nintendo has still faced supply issues around the world. Those issues are becoming even more apparent as the end of the year approaches, with Nintendo warning that demand will likely vastly exceed supply during the holidays this year.
As the one vendor who currently pulls a profit for the actual hardware itself, it is curious as to why Nintendo is stuck with supply issues. They have been tight-lipped as to why, though they are producing 1.8 million a month, which is apparently their capacity.
Will demand wane in the face of empty shelves, or will they work to find ways to produce more? According to several sources, the Wii has now overtaken the Xbox 360 for total consoles shipped, and if this trend continues it will continue to do so.