I managed to borrow a D7000 from a work mate this evening, on the promise that he got it back first thing in the morning.
So what did i notice different over the D200.
Shutter noise: compared to the D200 it sounds so much quieter.
FPS: the D7000 is only 6fps (not sure if grip extends that) but i was on CH and on numerous occasions i had fired off 2-3 images in one go, may not be much faster but certainly feels it.
Focusing: Some say that the main issue is that it's slower than the D300/s, it may be, but i found it fast (maybe due to D200), was nice to see the little boxes highlight where the focusing point actually was.
Battery: Praise be to Allah. I shot 71 images this evening, with the D200 with a fresh battery, i would have started to be worried, and looking at the meter level wondering when it was going to stop, the battery meter on the D7000 never moved (well impressed).
Image quality: As CS3 doesn't deal with the D7000 i am waiting for a genius to help me, i have the camera raw update/plug in, but a pc moron and know i'm doing something wrong. Images on the back screen look alot sharper and clearer (will post up when got it sorted). Raw files on D200 average 15.5MB, D7000 19.5MB.
Size: The D7000 is a little smaller than the D200 (so will be D300 also, but we knew that). Camera body fitted in my hand well (my glove size is 10 if that helps).
Buttons: A few are in different places, but the essential thumb/finger wheels are still in the same place, ISO has moved, but sure with a bit of practice it will become 2nd nature.
Overall: I borrowed the D7000 to either discount it, or add it to the list of possibles. I don't want to give the camera back. It would have been nice to have a D300/s to play with to do a comparison, but unfortunately not that lucky. Both cameras have their advantages, i primarily will be outside and animals feature so need the fast focusing, but having had an hour, the D7000 is starting to sway me.