Like many others who have already posted - I received the UPS notification that my 9/20 delivery is being rescheduled. No further information. And no real surprise. It would have been nice to see tracking suddenly update to the U.S., but that's only been my experience when I received my phone on launch day.
I gotta say, if I had known the pre-order process was going to be such a pain this year, I would have taken my chances with the reservation system. Between Apple's short supply and the (apparent) bad weather in China, I'm not counting on seeing my new phone any time soon.
PS: I'm assuming the absence of an actual delivery date is the reason I didn't receive a notification from UPS notifying me of the change. Did anyone else previously scheduled for 9/20 receive a notification related to this change. Just curious.