Hurry, though. We don't expect this to last for long and we'll update this post as changes come in.
UPDATE 11:50am EDT: As indicated in the comments below, Verizon is now showing 9/26 as a delivery date. AT&T and Sprint are still showing 9/21.
UPDATE 2:54pm EDT: AT&T is now showing "14-21 business days" while Sprint seems to be the lone holdout that still shows a 9/21 delivery date.
iPhone 5 Early Delivery Is Sold Out from Apple's Online Store, but check elsewhere...