All three Luxeon I LED's running and under Arduino control. These things are beasts I tell you!
Hardware
It's taken me a while to get around to building this electrical prototype but it seems to be working like a charm. Right now there are three separate National Semi driver boards powered from 9V with dimming wires connected to the Arduino for PWM. I have wide angle lenses and holders on each Luxeon Star that make each to a 20 degree beam which also let me look at them without burning out my eyes. My goal is to get these into a neat package that can be used as either an Arduino shield or standalone device with an AVR built in.
The second is a Processing sketch that allows control via the iPhone using TouchOSC and the Open Sound Control protocol. This sketch uses Firmata firmware on the Arduino.
I have further plans for the software that I won't get into here but it will be just as big a part of this project as the hardware.
Below is a small video of each color being testing.
*not sure yet why green wont turn off completely