It’s been around for several years. There is an AOL homepage from 1999.
The guy who runs this is named Urip Wisnuardi, I think he’s Indonesian. He also sells OEM GPS modules.
A Tapdrum board accepts up to 8 analog inputs from piezo sensors (or whatever–you could feed audio into it if desired), from which it generates MIDI note and velocity data. More than one Tapdrum circuit can be daisychained together to obtain more than 8 inputs….video here.
Anyone built this? Share your experiences.