If I were in charge of a MAC store right before a major launch like S3C3, I would try to keep a steady stock of products in the store. Maybe it's because I work in product/stock management for gift shops at Sea World, but what I would do is right when people call to pre-order items, I would look at the quantities I have already minus the pre-orders so then I would know what I am working with for the official launch. If I know I am not going to have much, I would reorder an ample amount of backstock at least to get me through the first weekend and keep ordering little by little and then as the hype wears out so do my quantities...just a thought.