I have created some new camera profiles for the Nikon D300 and D700. You can download them from here.
For use with Adobe Camera Raw v5 and above. Adobe Lightroom 2 and above. The profiles are dual illuminant and were created using 2500K and 5300K light sources.
nikplayer CS Nikon “Camera Standard” tone curve
nikplayer D2X Nikon “D2X Mode2” tone curve
The profiles were created using an X-Rite Color Checker and the Adobe DNG Profile Editor v 220.127.116.11 Beta. The profiles do not suffer from large hue twists when the recovery slider is applied.