>Richard, would you say the older D700 is far superior to the >new D7000, ignoring FX/DX aspect? (If that's possible) > >
If you judging this based on image quality then the d700 is not far superior to your d90.
Ergonomics are subjective, the d700 is bigger and heavier, the d7000 is smaller and lighter. Which is better for you? etc.
Where the d700 was better than the d90, low ISO shooting, the d7000 has caught up. The d700 may or may not do certain things better than the d7000 (depends who you ask and how they are using the camera), but if your looking for it to clearly outperform it, that is not going to happen.
In many ways this comparison is not camera dependent per se. To me this is really an issue of FX or DX. Ultimately this comes down to subjective ergonomic questions and the FX wide angle advantage vs. the DX telephoto advantage.
edit: I realized that Thom Hogan covered this in his d7000 review, he pretty much covers it: