I get the feeling this has been posted before but I just caught the show on PBS (2009 w/ Eric Clapton appearance). There’s a Moog Theremin right there on stage to his left! I didn’t see it used but I assume there’s a good portion of this not shown of public television.
I caught him in Seattle 4 or 5 months ago & he used his theremin with his guitar.
He’d swing the neck toward it & back, modulating some kind of other effect.
The Royal Albert Hall DVD is so awesome… and to think, this guys is just now… like, 33 yrs old and he’s been playing with BB King since he was 12… check out “Blue and Evil” - http://tiny.cc/vv8ik