It should be interesting. I've been trying since 8AM EST. It is now 10:16AM EST. I've tried both Apple and ATT.
With Apple it gets to a point and says that the session has expired - maybe they should create longer sessions today.
With ATT, I get the CC# put in and press check out and it ends up timing out. Too bad their server does not hand orders with a CC# typed to a different server so that the order can complete. Many people do not like typing their CC# in multiple times not knowing if it is charged or not. Who knows, maybe I will receive 50 iPhones on June 24. haha