As the proud geek that owns this vehicle, I can answer Simon's question: in college I majored in physics (at Caltech) but I was an engineer with a biotech company right after graduating, wandered over into cognitive psychology for my PhD (at Harvard), and I'm now doing a postdoc with an artificial intelligence group (at RPI). So more or less "all of the above", except I can't really claim to be a mathematician.
Cheers,
- Miles, Emir of Geekistan