Recently I was speaking at conferences, seeing family, and meeting people in London, so I made some improvements to Archaeopteryx and built a drum and bass groove generator while riding (and waiting for) various planes, trains, and automobiles.
I haven't got it in svn yet, or migrated it to github for that matter, but here's a pair of videos:
Hard-coded painfully-simple bassline
Dynamically-generated plain-old-painful bassline
I only had so much juice at the airport, so they're both QuickTimes, slightly over 20MB.