Amazon and 800 CEO READ have both jumped the gun and started shipping Seth Godin :: Free Prize Inside.
Amazon has a very aggressive price. 800 CEO READ is even cheaper if you buy 6 at a time. Your local bookstore might be inclined to give you a discount if you let them know your options and are willing to buy a bunch for all your friends.
No promises, by the way, on how long the cereal box will last. As I write this, both Amazon and CEO READ have at least 1,000 left.