I've been watching Thomas Grillo's six volumes of theremin lesson and greatly enjoying them, though I'm sure they'll click better once I'm in front of one of my own. I love his concert on the B3 that's out there too, especially the Moonlight Sonata which is about my favorite piece of music ever ever ever. *grins*
I also liked Randy George's cover of Daft Punk's "Something About Us" so much that I bought the MP3 from his site to play in my car! I love the integration of the various bits of tech he uses, and I keep getting a kick out of the Nintendo DS part! (That's at http://www.youtube.com/watch?v=Bkp9bDGDd1w) His rendition of the Legend of Zelda theme is cute too, for a classic video game buff like me.
I've been watching some of the recordings of Clara Rockmore that are out there too, of course, as well as most of the other stuff I can find.
So out of all the content that's out there, what are your favorites?