This is 99.999% confirmed to happen 11:00 am on Thanksgiving Day. I couldn't believe it either. It is some big promotion amazon is doing where people vote on ridiculously amazing deals and the 1 that wins goes on a sale at a scheduled time. Here is the site to vote (and proof):
Amazon Customers Vote HomepageI'm gonna try to get 2; 1 to sell for profit and another to keep as a backup (in case my 360 starts acting up 1 day when my warranty is dead). I'd still end up with a bit of a profit too (although brobably not more than $50).