found this story at this website - Wiiseeker - Find a Nintendo Wii Near Home
Apparently, many Wal*Marts are already sitting on some Wii units, but are ordered to hold them Until December 3rd. If the rumors are true, you have a good chance of getting a Wii on Dec 3rd. Our searcher marks the stores which are are open 24 hours with a green marker on the map. Good luck!
hope that helps ya'll