Arduino SNES Project
I FINALLY got around to having a go at this Arduino business. I wired an SNES controller to my Arduino Uno. Then I wrote a program for the Arduino to poll the controller and report the button status over serial. Total project time was about an hour, including the time spent doing research and stripping wires.
These web pages were very helpful:
http://www.mit.edu/~tarvizo/nes-controller.html - has a diagram showing how the latch, pulse, and data lines work for the NES
http://pinouts.ru/Game/snescontroller_pinout.shtml - explains the differences between the NES and SNES, which are minimal