Presumably, you'll be able to make basic RAW adjustments to D700 files in View NX, which is free.
As for D700 support, the word I'm hearing is that NX 2.0 already supports these files, and that NX 2.0 will be required for D700 files. I even found a D700 NEF on the 'net, and it opened in NX 2.0 (I'm assuming the file was legit, but I have no way of proving it).
It doesn't appear that NX 1.x will be updated to support the D700.
However, nothing is set in stone as Nikon has not announced what their software policy is regarding the D700.