I'm a Propellerhead Reason user and I plan to Rewire the software to Steinberg's Cubase DAW. My plan leads me to ask two questions about using MIDI keyboard controllers and control surfaces.
Nintendo's ultra-affordable Wii Remote controller can sense movement in every direction, and even knows at what angle you're holding it. Its potential as a music controller is unlimited, and you don't even need a Wii console to use it!