MidiTron: “MidiTronTM is a new MIDI to real-world interface designed to simplify the process of creating sensor and robotics based electronic art projects. It is easily user configurable and provides 20 terminals of digital and analog inputs and outputs in any combination.”

Looks pretty cool - makes it nice and easy (maybe); I'm still going to try and roll my own for the experience of it, but it may be useful to others (or to me down the line when I fail dismally!).