What’s the difference between buying it at an AT&T store and at an Apple store?

AT&T STORES

The AT&T stores will only sell you one and they will run a credit check before selling you the phone – mainly because that way they can track who gets commission on the sale – especially if they load you up on accessories and iTunes cards. Apparently (according to BOY GENIUS REPORT), AT&T will give you a special code to enter to speed up your activation process in iTunes. If you do not pass the credit check, they will tack on a $250 deposit.

I’m not currently an AT&T customer but I’ve heard how the deposit process works is if after a year with no late payments, they return your deposit – however, if you are late a month, that 12-month cycle starts over again. If this might apply to you,you might want to double check.

But presumably, if you have an AT&T account, they won’t need to do the credit check.

APPLE STORES

No credit check. Buy and go – perhaps you’d like to add a 30″ monitor with your iPhone? (though no hard sell, of course).

Apple stores will allow you to buy two (eBay better fire up some more servers tonight).

And as part of their best-in-class customer service, at the end of every night, they will update their in-store stock checker web page so you can decide if you want to head in. Nice.