FYI:
Since I posted this, I noticed that the picture, which is hosted at flickr, is seeing slightly more activity than other pictures I've put up there. I figured out where the traffic was coming from when I was poking around
Theremin World and saw somebody had been linking to it to discuss what the equipment is. They wanted to know about who the guy is.
So I did some looking around, and figured out the guy is Arthur Harrison, who happens to have a
webpage on how to build theremins, and the band he is playing with is called The Cassettes. You can go to their webpages, if you wish, and hear some music samples.
http://www.thecassettes.com
and
http://www.myspace.com/thecassettes