Just downloaded and managed to successfully update my Lightroom 2.1
The biggest and welcome change for Nikon D700 (and D3) users is that you can now load Picture Controls (akin to Nikon's Raw software) to your images, which I was never comfortable using as compared to Adobe's Lightroom.
The profiles may be accessed in the Develop Module. On the right side, scroll down to Camera Calibration.
Profiles Available:-
ACR 4.6
Adobe Standard
Camera D2X Mode 1
Camera D2X Mode 2
Camera D2X Mode 3
Camera Landscape
Camera Neutral
Camera Portrait
Camera Standard
Camera Vivid