This weird thing is a Stick Enterprises 10-string Chapman Stick® in white oak - a fantastic instrument that I use mostly just for bass lines.
I knew about the Stick from Tony Levin playing on Peter Gabriel's albums, but I didn't see one "in the flesh" until Johnny Fleury did a demonstration at a music shop in Auckland, NZ. I ordered one through the shop, and at the time they said that Stick Enterprises had told them that they could only deliver if two instruments were ordered. The store was a bit nervous about ordering two when they only had a confirmed order for one, but they went ahead and ordered two and requested that one be shipped at first.
I don't think they ever took delivery of a second instrument!