I type "Forza Motorsport 4: Limited Collector's Edition" into google, and get results for Overstock.com, Walmart.com, and BestBuy.com. Strangely, Amazon has it listed, but it's being sold by 3rd party individuals who I can only imagine have been hitting
the crack pipe, as the cheapest listing is $475. o_O
It looks like most everyone is sold out. Even the Microsoft store doesn't have any! I know several people who are getting rejection letters that are canceling there pre-order and bumping them down to the normal edition.