Addendum (30 September 2002): Well, thanks to my mentioning the Roaring Boys in a post that appears further down this page, a few people have wound up here looking for the song. I've now gone and put the MP3 online.
Download The Roaring Boys -- "House of Stone".
Downloaded another boatload of tracks featuring Underworld playing live; this time I downloaded their set from the Eurokeenes Festival in 1998. Can't say I liked it as much as the set from the Fuji Rock Festival. If I had to pick a favourite track, I'd go with "Rez", since I think it's better than the studio version.
Also checked out the Wired piece on lowercase sound that every other blog on the planet seems to be linking to. Quote:
"Lowercase sound" is the name given to a loose movement in electronic music that emphasizes very quiet sounds and the long, empty silences between them.
At the risk of sounding curmudgeonly, isn't this just a re-branding of musique concrete for the post-ambient set?
The Wired piece has links to a bunch of MP3 excerpts, which I naturally had to download. Even with the volume setting cranked on WinAmp plus my external speakers being turned up, it's pretty quiet. Quelle surprise. A couple of the tracks make for good ambient background noise. I wonder if listening through headphones would enhance the auditory experience. I'm not that bothered to find out at the moment.