I tried to reserve an iPhone 4 through it this morning, but each time I enter and submit my phone account info, the app crashes and I'm returned to my iPad's home screen.

If I had to guess, I'd say AT&T's systems might be the problem since it crashes at the time the AT&T account info is submitted, but who knows. Regardless it's not a very graceful way to handle an error. :)

You can shop for anything Apple in the app, which is actually pretty slick.

Update: Still having problems on the AT&T site (which says it’s down for a server upgrade) and the Apple site, as well as the new iPhone store app doing the reservation. Honestly, you’d think these huge companies would plan ahead for the kind of volume they get every time these releases occur? If your bank planned ahead like this, you’d never get you money. It’s really completely inexcusable, and the track record is horrid. It’s hard to feel comfortable trusting my communication services and information to companies that don’t successfully execute on the basics like availability. Yikes…