Hi,
i love the concept, mayb you could make a function so you can say wether it drives the outputs high or low (dependign if its anode or cathode commen) and i would really love a function to send a Hue value to it, once you mkae it easy to send the hue or RGB value to it im definatly over the moon, im building a custom xbox case that is full of rgb leds and im planing to have the colour fade across the xbox, so if i could use this to send the hue to like 10 rgb leds one after another i would be over the moon 
Thanks, and keep up the good work.