I hadn't received any notification of delivery whatsoever before today - no email, no tracking number, no update to my order status.
At 12:17 pm this afternoon, my tracking status appeared and updated with an origin scan in Louisville, KY...but no scheduled delivery date.
At 4:28 pm, my tracking was updated with an arrival in my home city of Minneapolis with delivery set for tomorrow, the 19th. Same day departure and arrival.
Don't despair until tomorrow. I suspect that I, unlike the vast majority on this board, have been with Sprint longer than most, for over a dozen years, with countless experience in pre-ordering the latest and most highly sought after devices (HTC Mogul being the most exciting wait).
I cannot express enough how disjointed and random Sprint's ordering and shipment process is. I've received my pre-order on release day many, many times without any notification at all. The phones simply appear as a pleasant surprise after resigned to my fate of waiting the next day or over the weekend.
Hope everyone finds the same success.