okay i watched the live streaming event, and now we have the official release date and prices:
Wii U will be in stores 11-18-2012 North America, and 11-30-2012 Europe(thanks go to xBASSxMONSTAx for Europe's release date :D)
Wii U Basic(White Console and 8GB) will be: $299.99
Wii U Deluxe(Black Console and 32GB) will be: $349.99
source: http://www.nintendo.com/wiiu