The initial project is an Arduino based fish tank LED lighting controller krusduino
The latest release of software is r13.
And the Krusduino User manual can be found here http://code.google.com/p/dangerduino/downloads/detail?name=KrusduinoUserManualv1.pdf&can=2&q=#makechanges
The follwing link Nano-Reef Post 1 and Nano-Reef Post 2 give an overview of the hardware. Page 3 of Post 2 shows some photos of the arduino.