Did ya email
sjobs@apple.com?
Come on folks! It's just a frigging phone. More preorders were placed then either Apple or ATT were expecting.
The systems crashed, some corrupted orders made it into either Apples or ATT's databases without the two systems reconciling. In addition some people are exceeding the number of phone orders permitted.
A lot of people that could not get a pre order to go through opted to do a store reservation which constrained the number of phones available. These same people managed later to get a pre order, but are retaining the reservation just in case.
I've also seen a number of orders reported cancelled because their ATT account was not in good standing.
So what you are seeing is largely the companies trying to weed out the bad orders that resulted because Apple and ATT's systems could not sync up.