Update: HP's U.S. online store is now listing the HP Elite x3 as shipping on September 7 for orders that are put in today
There's no word yet on when shipments for the phone will begin from HP. People who do order the phone from the site are also getting a couple of extra promo offers. One is for a discount of up to $40 off select Bose speakers when you buy the phone, while the other is for getting the HP OfficeJet 4650 All-in-One for only $29.99 with the purchase of the Elite x3.
The Microsoft Store U.S. site just pushed back the ship dates of the HP Elite x3 from Sept. 12 to Sept. 26. We will keep you informed when shipments begin for the phone in the U.S.
Thanks to AlexanderJJJ for the tip!