Sound Builder Ranjit Bhatnagar shows Motherboard TV how he goes about designing and building an automatic accordian of-sorts.

Click!  --> http://www.motherboard.tv/2010/7/19/sound-builders-ranjit-bhatnagar-builds-us-a-keycordian--3  (I'll pester someone to get the embedded video working...)

I met Ranjit at NYC Resistor last year where he was hanging out with a player-toy-piano that he had MIDI-fied.  Here's a few seconds with a monome driving it.