Gamespot has this news article up detailing the Nintendo Wii launch in the U.S. The console will be available on November 19th (two days after the PS3 launch for those of you wondering) for $249.99. It will come with a pack-in game Wii Sports which is a compilation of Tennis, Golf, Baseball, and Bowling. Eurogamer has linked to videos from the Japanese press conference showing off the Wii's menu system.
The more I think about it releasing the Wii 2 days after the PS3 is probably a really good idea. Sony's 400,00 units will easily be gone in two days, and all of those people looking will be finding stacks of Wii's. Nintendo isn't trying the 'worldwide launch' meaning that Wii's will be plentiful in the U.S. since it doesn't launch in Japan until the first week in December.
Edit update, USAToday has confirmed the release info, and here is a link to the Japanese press conference on Nintendo Japan (in English with slides, and videos.).