Saw this at the Lake Forest, CA store for 379.99. Includes Forza Motorsport & Marvel Alliance game. Not sure if this is nationwide. They had 3-4 in stock at the time I was there. It looks like this, the black version:
http://www.bestbuy.com/site/olspage.jsp?skuId=8301492&st=xbox+360&type=product&id=1172881999620
http://www.bestbuy.com/site/olspage.jsp?skuId=8301492&st=xbox+360&type=product&id=1172881999620