[Amos] sent in the Living Interface. I call it a microscope reactive aquarium. A small light sensitive animal is inside a mini-aquarium on the scope plate. The wires are attached to lights at the edges to attract the animal. The position of the critter is reported via a digital aquarium. (looks like an empty aquarium combined with a projector. Aside from looking friggin cool, it has applications for measuring water toxicity by measuring the reaction time of the animal.
A while back, a friend of a friend supposedly used a USB microscopes to measure yeast activity in his beer brewing. If anyone runs across it, let me know.