You may remember I mentioned last year that the FX series were recieving a number of "waivers" for WHQL certification (I think these pertian to the 14 or so that Fudo listed in his article a little while back). XBit have put up a news article that actually acknowledges waivers.
Personally, I think this is the reason behind NVIDIA's present confusing driver policy. NVIDIA stands by its UDA, and the FX series is part of that UDA - I'm wondering if MS is no longer as willing as it once was to offer waivers for the FX series which is why we are seeing more releases (not at NVIDIA's main site) that have WHQL certification for GeForce 6 series specifically.
Personally, I think this is the reason behind NVIDIA's present confusing driver policy. NVIDIA stands by its UDA, and the FX series is part of that UDA - I'm wondering if MS is no longer as willing as it once was to offer waivers for the FX series which is why we are seeing more releases (not at NVIDIA's main site) that have WHQL certification for GeForce 6 series specifically.