When I hear "Theremin", I think of Simon and Garfunkel's
"The Boxer".
This link is an awesome live version of this song. Theremin solo begins at about 2:15.
(I've been on a S+G kick lately. Hard to believe I never appreciated their music before. Here's
"Mrs Robinson" from their famous Central Park concert. I watched this link, and suddenly wanted to learn the lyrics and sing along with them, which is precisely what I've been doing for about a month straight now, to these two songs, as well as
"Sounds of Silence". I'm hoping Daliman can do the Garfunkel high notes part, and we can jam some S+G.)