I ordered from AT&T on Thursday, March 27th at 9am PT. As of 4pm they are "Preparing for Delivery". I paid for expedited shipping but AT&T says delivery between 04/01 and 04/03. I will be very bummed if the stores have them in stock tomorrow and I have to wait.
AT&T let me out of the remaining 8 months on my contract by doing the Next 12 plan. For me that is a net increase in my monthly fee of $15 and I get a new phone in 12 months. I am happy with the deal.
Update #1: At 6pm on 03/27 I received a shipment confirmation from AT&T. Expected delivery by FedEx is shown as 8pm on the 28th.
Update #2: 500am PT on 03/28 the device had departed the FedEx distribution center in Memphis, TN
Update #3: 700am PT on 03/28 it had reached the destination sort facility in San Diego, CA. (I don't know how that is humanly possible... but I'll take it!)
Update #4: 9:15 am PT - On vehicle for delivery