Edward Ingold , Aug 07, 2010; 11:28 p.m.
Nikon specifically states that Nikonscan will not work under Windows 7 nor any 64 bit operating system. Windows does have a free virtual window which loads XP and most XP software, but has limited access to the hardware layer. For example, you can't connect a printer to the Win 7 computer and run it in the XP window with XP drivers.
Both Vuescan and Silverfast AI are compatible with Win 7 (64), and have drivers for the Nikon scanners. That is your only option for the forseeable future.
Nikon is apparently selling scanners from current inventory, with no intention of resuming production once the supply is exhausted. LS-9000 has outlasted the others because it is expensive and relatively few people use medium format film. The decline of film's popularity and the inroads of cheap flatbed scanners, good enough for web quality and 8x10s has eroded the market beyond the tipping point.