AT&T's 
iPhone 4  upgrade ordering systems are collapsed. 
Updating live: Readers are  also reporting account security breaches.
The reason for the long lines, however, is AT&T's ordering  system. Readers in the comments are reporting that the systems are  collapsed everywhere. Here's what our own Kyle VanHemert had to  experience this morning:
They're just using some web interface, not the exact same customers  are using online, but not much better. It's probably the same servers.  Basically, they were getting one pre-order thru every 20 minutes. They  said the problem was system wide. Here's how it worked: They just kept  mashing on the 'submit' button and getting error after error. On the  umpteenth try, it'd go through and then the next step, whatever that  was, would get error after error. After a long time, it would finally go  through. What's worse is that the first step of the process reups your 2  year contract, so you can't walk away if you get fed up. I had to stick  around until it went through, or i'd have a new contract but no  subsidized phone.
Truly pathetic. Knowing the interest in every new Apple iPhone, and  knowing that there are millions of people eligible for this—
admittedly  very attractive upgrade—how could this be?