Giardia put out an LP of modern compositions on glass harmonica by Simon Wickham-Smith a few years ago; it is a total masterpiece, especially since it uses such an incredible instrument to make sheets and layers of beautiful frequencies instead of novelty versions of "Baby Elephant Walk" or some other such nonsense.
If you can track it down, it is truly essential. It's called " Giladji."
Edit:
Found a copy here!
http://www.flippedoutrecords.com/fli...wicgillpg.html