ownFX is the attempt to create a "Alien FX" like lightning system for custom build PCs. A Arduino which is connected to the PC via USB is used for communication with a RGB-LED-strip. The lighning system is controlled by a webpage hosted on the local machine in order allow remote controlling.
Stay tuned and have a look at the developer's diary: http://extreme.pcgameshardware.de/tagebuecher/355883-tagebuch-led-beleuchtung-mit-arduino.html
Installation Manual (German): http://extreme.pcgameshardware.de/casemods/389199-howto-rgb-beleuchtung-mit-arduino-ownfx.html