>Obviously we can't see into the future, but I strongly suspect >that Stan is correct. Nikon doesn't have to do much to a D400 >to sell it. Make it bigger (to give it a more 'pro >appearance), give the 300/300s users their buttons/switches >back, give the long time pros a CF card slot and allow 9 shot >bracketing and they can tout it as the 'pro' model with all >the same technology as the D7000.
I think you are selling Nikon short. You are also characterizing a significant segment of Nikon's market as form over function buyers. In my experience with Nikon this has never been the case. At each model interval there have been good, solid, intelligent reasons to stay within a certain 'class' of body. And the reasons have always been more than some feeling of superiority from buying a camera that was nothing but more expensive than the next model down.
We'll see, but as yet there is absolutely no reason to suspect that Nikon will release a D300 successor that will not be compelling to current D300 (and D200) owners for good, substantial reasons. And if they do, the D7000 will be a fabulous camera for us to upgrade to.