>I thought that maybe Amazon was trying to tell me that the 9/18 date was not going >to happen.
That's possibly the case. What's changed since your D7000 was the D800 fiasco, where some people who pre-ordered in February are still waiting, while a trickle of cameras continues to make it to retail.
The good news is, for you, Amazon seemed to do better with delivering pre-orders than most of the big online camera stores. Lots of B&H customers cancelled their pre-orders after finding the camera at Bust Buy.
Hopefully Nikon is better prepared to handle this release.