Here is a great design created to allow a full 6 axis representation for gaming. The idea is very well done. This guy created a controller from what looks like a basic 25 pin serial pci card. He intergrated a CUBLOC 405 module for the resource processing and a Dimension Engineering Accelerometer to sense the motion throughout the axes. He added a usb connection to intergrate the joystick functions. I hope he patented it before he posted it.