The thief that took it plugged it into his roommate's Mac and tried to restore it. Even though his attempt to restore it to working condition did not work, you can be sure the device's ID number was sent to Apple's iTunes Store servers. I am confident Apple was on the lookout for the unique ID of that device and the minute it showed up in their logs, they also had an instant match to the iTunes Store account of the person that owned that Mac. Instant name and address!
Take a look at this article:
http://www.wired.com/threatlevel/2010/04/dude-apple/
At the beginning of that article, it mentions that Apple representatives went to that home and knocked on the door. A roommate answered and refused to let them in, etc. Farther down, it mentions the part about the thief having connected the iPhone to his roommate's Apple computer.
So, think about that... If Apple did, indeed, get the person's name and address from the iTunes Account, and the computer belonged to the ROOMMATE (not the thief), then the person that Apple would be asking for at the front door is the name of the roommate. But the guy that answered the door said the person they named wasn't home and he wouldn't let them in.
My bet.... the person that answered the door WAS the thief! Apple wasn't going by his name, they were going by the name of the person that owned the Mac... the roommate.
It seems at least possible that Apple representatives were speaking directly to the thief and didn't even know it.
Mark