THIS IS NOT A HOAX.
New audio driver (v4.31) with new control program NVMixer:
http://www.nvidia.com/object/nforce_audio_4.31_win2KXP
New IDE driver (v4.12):
http://www.nvidia.com/object/nforce_ide_4.15_win2KXP.html
***NOTE*** both drivers are official BETA's, WHQL's are expected to be out sometime this month.
I've only installed the audio one so far, but no problems yet, and the new control app is nice. Supposedly fixes audio problems/imporves performance with BF1942 (amongst others), dunno what exactly.....
Also, they have new ones available for you suckers still running win98se