I noticed the Wii could be added to the cart and pre-ordered at Gamestop.com. I don't know if this is the right place to put this or not and I hope it isn't a repost. I was able to pre-order one w/ my edge card.
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=63944
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=63944