I’m using an Arduino to control two (maybe more – I haven’t tried yet) AD5204 digital potentiometers. Here’s some info about adapting the digital pot Arduino example to work with daisy chaining.
I had trouble using Arduino to burn the bootloader onto a blank atmega8 with my ST500v2 development board. I eventually figured it out and here’s the deal.
I wrote this library, called NESpad, for anyone who wants to interface an NES game pad with the Arduino microcontroller. I also made an SNES library (SNESpad), but I haven’t tested it with an actual SNES joystick.