Dean Shostek is one of the people listed on the Wikipedia site, though misspelled there as "Shostak". He works for Colonial Williamsburg (in Virginia) and gives glass armonica concerts there. He also gives concerts and demonstrations in the area as a whole. He used to appear regularly in Washington DC at the National Geographic Headquarters when they had Friday noontime concerts each week. These mini-concerts have been discontinued, so I haven't seen him lately, but I sometimes notice a local listing that he's playing somewhere around. It's the music of the Colonial period, and not contemporary music, if that is what you are looking for, though.

He described his excitement at first acquiring his armonica, which was supposed to sound "like baby angels singing". But he was dismayed! Despite his pretty big investment- he couldn't get any sound out of it at all for quite a while.

Linda