Trent Reznor has made available a new set of the 24/96 wave files, and also a flac version of them. Apparently the original wavs were not really 24 bit, apart from 2 tracks.
For those interested, there's a thread at the Hydrogenaudio Forums with the details.

...a music project designed to explore how far a musician can take his music with the new economics of the music industry.