You can download the paper that accompanied the interactive demo of the BeatBearing at NordiCHI’08 here:
http://www.sarc.qub.ac.uk/~pbennett/papers/Pete2008BeatBearing.pdf
(clicking on the images above gives you a jpeg preview and not the real thing)

At the moment this is the most complete description of the BeatBearing project to date. Hopefully it helps explain the theory and also why I’m creating a sequencer that doesn’t even play 16th notes!
I managed to take some good video footage of the BeatBearing in use at NordiCHI too, so hopefully I’ll get it edited and posted soon. Until then I’ll post some pictures of the new BeatBearing to whet your appetite.