Thanks to wiltwong and Markus Lange, I have added support for Arduino Mega and Leonardo to the Colorduino Library. Markus also helped to clean up the code a bit for Arduino 1.x. I have added the ColorFill() function to the ColorduinoObject class, as well, so you don’t have to copy it from ColorduinoPlasma.pde.
You can download it from github: https://github.com/lincomatic/Colorduino/downloads