But this time, things are really at the next level. The album is available here. First off, you can get 9 tracks for free to see if you're even remotely interested in the album. If you are, you can get all 36 tracks for $5, and they're available in really high quality formats (including lossless formats that aren't degraded due to compression). You also get a 40 page book via PDF and a bunch of extras. You can also get the physical CDs if you want for $10 and though they don't ship until April, you still get the digital version of all the tracks right now. Their server is blowing up due to the news about this release spreading, but it's also available via Amazon for the same $5.
And finally, the hardcore fan can get up to a $300 package which even includes the vinyl LP and is signed by Trent. With only 2500 of those being made, $300 is a great deal for true fans.
I'm a casual fan of NIN, and I find this incredibly awesome. One can only hope it catches on with more artists (Radiohead has tried similar online distribution).
And if all of this weren't enough, the entire album is published under a Creative Commons License permitting anyone to share and remix the album for non-commercial purposes.