The new firmware version of Curious Inventor’s MIDIATOR Kit lets you map any button or joystick on a game controller to any MIDI note or controller, including button pressures.
For instance, you could make the vertical axis of the left joystick go from 89 at the bottom to 34 at the spring-returned center, to 5 at the top.
The video demos using a game controller to play a Jomox XBase09 drum module.