Other MIDI sensing platforms 
- Eobody (Eowave)
- MidiTron (Eroktronix)
- I-CubeX (Infusion Systems)
- MidiBrain (Paia)
- MidiCreator (York U.)
Sensor Suppliers
- Images SI Inc sells bend/flex, presssure/force, and non-weighted piezo sensors
- Digikey sells photosensors, weighted piezos, etc.
- Acroname sells a range of Sharp IR distance sensors.
- etc. etc.
Links
- Handy MIDI specification website with ful MIDI details
- Sweetwater, nicely priced MIDI cables, etc.