I've been testing Lightroom 3 for a couple of days, and I confess myself extremely impressed. The implementation of chroma noise processing is worlds better.
Case in point, here is an M9 image from one of the review sites taken at ISO 2500:
The white rectangle denotes a shadow area that I used for testing. Below is a comparison of the LR 2.5 and LR 3 renderings with the same settings for noise processing / sharpening. Other settings are their defaults so perhaps not the same but this is what you get when you open the file.
This is 100% pixels:
Remember: this is the same DNG file. The one that's _vastly_ better is the Lightroom 3 image, I don’t think I need to say which is which.
Seriously this software just gave the M9 that little extra oompf I wanted to see. I think if that’s what ISO 2500 shadows look like then it’s fine. No, no fine, great! I'll take this any time.
What can the D700 do with this software wonder? Well ISO 6400 is more usable for one thing. But the lower high ISOs (heh) don't improve as much honestly.