Haha, great article! too bad the video is unavailable :-(
I really enjoyed that little diversion too, wonderful project. Just enough detail in the article that you get a nice little taste of the complexity without getting lost in the detail. Bravo all round.
That video was recorded by another developer, who had some personal (non-legal) concerns with it and plans to reshoot.
Hope we can see a vid of Quake on iPod soon!
The devs on those teams really pushed that little MP3 player to do things it was never intended to do.