Thanks Jeff - glad you liked it.
I have now embedded some youtube videos of the event.
I have one of the H1 'Theremins' still to be constructed, and intend to do this while taking photos / videos / audio samples, and to publish these.. it will probably be about a month before this is done - but I hope this will be useful, particularly for constructors.
I also know that many people took videos of 'my' Theremins being played - if anyone sees any of these videos on-line anywhere, please let me know..
My good camcorder was DOA when I got to the event - I went off and quickly bought a cheap camera with video recording, just to have a record of the event/s (most of the photos on my site were taken with this camera) - I also took loads of videos - but never realized that this camera didnt record sound!