According to this initial review, the D7000 falls in the middle between the D90 and D700 in many areas. This is rather good for a DX camera in the D90 price range. But those of us expecting D700-like performance in a smaller body may need to wait a bit longer. Folks over at Nikon Cafe reported similar findings.
The one area where the reviewer is not happy is image sharpness, but this could be attributed to the high pixel density which easily shows any lens imperfections.