I thought that I would announce a library which I have ported to work with the Adafruit Trinket. I ported the Wii Nunchuck Library to work with the Trinket, and all of the functions except for the debug-over-serial work without any issues. I have removed any functions which do not work in the library to eliminate any confusions. Also, I have completed the code which was originally posted at the Arduino Forums to support syntax highlighting in the Arduino IDE and have included a demo sketch along with the library to make sure your controller is working. The hookup instructions are different, so I have also included those at the top of the demo sketch.
You can download it from my Github, located at: http://www.github.com/PyroAVR/TrinketNunchuck
Note that it requires TinyWireM to be installed in your Arduino library path as well.
I hope that someone can make use of this!