I just wanted to let you guys know what I found out. If you have heard any contradicting information please feel free to correct me.
I have spoken with the customer service people at my local Costco (USA). They were some what leery about giving out any information concerning the launch of the Wii. It seems they may not start selling until after the 19th. The costomer service representative told me this was due to the chaos caused by the 360 launch. Also the Costco webpage has pulled the Wii add from the product list. There is always a chance they are full of crap.