My wife is an Assistant Manager at a Walmart Supercenter. She told me a couple days ago that they were essentially taking "unlimited" preorders. As of today she received news from her superiors that the preorders are not "unlimited" that supposedly once Walmart has hit the cap for preorders the UPC they use to set up the preorder with cease to work. They also said they predict that tomorrow 1/20 will be the last day the UPC will work. So if you were on the fence about preordering at Walmart I would suggest going tomorrow before its too late.