I know many of you are getting desperate after so many hours of trying...but stay away from AT&T.com. They are not anything like Apple, and there is absolutely no guarantee that your order will even go through.
AT&T can and may even delete your order if its in some way incomplete, or they suspect a duplicate, etc... Point is, its a terrible online ordering system on a good day, today is the wrong day to be testing it out it for the first time.
Those of you hoping those AT&T orders to be delivered on June 24/25, you'll be lucky if they arrive in June, at all.