I have posted a zip file containing updated "Camera" color profiles (Camera Standard, Camera Neutral, etc.) for the Nikon D3 and Nikon D700. The zip file contains a copy of the readme, but I'll post it here for convenience, too:
BETA RELEASE NOTES
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Overview
These updated Camera v2 beta profiles for the Nikon D3 and Nikon D700
are designed to reduce banding and highlight color artifacts. Note
that highlight areas may appear a little brighter compared to the
earlier profiles.
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Installation
If you are on Mac OS X, drag the "Camera v2 beta" folder to:
/Library/Application Support/Adobe/CameraRaw/CameraProfiles
If you are on Windows XP, drag the "Camera v2 beta" folder to:
C:\Documents and Settings\All Users\Application Data\Adobe\CameraRaw\CameraProfiles
If you are on Windows Vista or Windows 7, drag the "Camera v2 beta"
folder to:
C:\ProgramData\Adobe\CameraRaw\CameraProfiles
Note that the above path on Windows Vista and Windows 7 may be hidden
by default. Check your folder settings.
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Feedback
The profiles are currently in beta status. Please provide feedback via
the online Adobe user-to-user forums here:
http://forums.adobe.com/community/cameraraw
http://forums.adobe.com/community/lightroom
Thank you!