SID emulator

hi all,
reading up on the arduino SID emulator and SIDuino in the playground – http://www.arduino.cc/playground/Main/SID-emulator – i find quite a lot of broken links… does anyone have the correct links / files?
also, there is a mysterious reference to christoph’s page: http://www.arduino.cc/playground/Main/SIDuinoCode — which page is this?
best,
jacob