They abuse seamless shuffle with an 88 track minidisc album that's designed to be played on random shuffle. It basically sounds like a Farmer's Manual album, but it's still wild.
Autechre was the first thing I thought about when I read your post :)
I was thinking more about hooking up a deck to an arduino and sending the "skip track" command at 20hz, or something like that. Record, chop, loop, and you're away.
In a few years, when I inevitably get bored of melody and back into brain-melting glitch music, this is what I'm doing.