(image hosted on Bill Thompson's website)
According to the press release following the burning/performance, Bill Thompson said, "It was very beautiful to see and surpassed all my expectations." He recorded the instrument burning, attaching mikes to it so that he could record the sound of the flames consuming the instrument, which he rescued from a scrap heap. It's hard to tell what kind of an instrument he used (A slabside Zuckerman? An old Neupert?). Perhaps I'll email him and ask.
Bill Thompson is going to make a DVD of the event from the video footage, audio recordings, and photos friends took.