I saw collection of these (more properly known as tongue drums) in a
shop in St. Michael's MD. Of special note was on particular piece,
where the craftsman (sorry I forget his name) has build a large one as
part of a coffee table. It looked beautiful, sounded absolutely amazing
(the larger size of the resonator box proved very beneficial to the
lower frequency tones) and it was a functional table to boot. Had it
not been $4500 I would've bought it on the spot!
A friend of mine is actually taking up woodworking specifically to
build tongue drums; if anyone has any good links to plans, tips, etc.
I'd love to pass them on to him!