Unlocked? Heh. You can't even plug your existing AT&T/Cingular SIM card in there; the iPhone must be activated first. Not sure about after that; perhaps the upgrade with same phone number process involves switching the SIM after initial activation, but probably not. The info does reference "pre-installed SIM card", though, so it does apparently have the typical removable SIM. If you go to the iPhone site and zoom in on the top using the 360 view, it looks like there's a cover for such a slot there.

The thing about not activating it on corp accounts is odd. I understand the "no corp discounts", but why can't it be put on an account? Maybe later. AT&T stores, apparently (and presumably Apple stores as well), will have a one-phone limit at least for Friday.

Here are AT&T's FAQs, from which I grabbed the above answers: http://www.wireless.att.com/learn/iphone-faqs.jsp

Main iPhone page at AT&T http://www.wireless.att.com/cell-pho...als/iPhone.jsp

Also interesting, even if you just signed up for AT&T or just upgraded, you can still upgrade to iPhone immediately.

Apple Q&A is typical, glossing over some things like "Can I unlock the iPhone...?" http://www.apple.com/iphone/questionsandanswers.html We know it works outside the country for roaming, but unlocking is still a mystery. I suppose they could make these first units completely and forever locked if they desired. Any reason they couldn't do that?