Update
Still following up on this. NEC support has now told me that Colormunki Display is not a supported colorimeter. Other Colormunki products are supported (Photo, Design), but Display is not.
They only realized this after I bought their monitor and software, tried it and then told them it does not work, which makes you wonder a little about their R&D; the Spectraview release notes list Colormunki as being supported, but does not differentiate between the several Colormunki products...
To their credit however, in order to make it up to me NEC is sending me one of their colorimeters at no charge, so that I can correctly set up and use the products I purchased. I could follow up with my results once I get the display set up and calibrated with the NEC colorimeter, but those results are well documented elsewhere.
So to follow up with my original user's report: Spectraview II+ColorMunki Display are not compatible and will not calibrate an NEC display using its built in LUT.