I wondered about this as well and I'll be following this thread to see the responses.

I created something similar for a New Zealand company a while back where the color you chose on the Pantone style color wheel would put out the correct RGB values via 232 and also display them on the device, but someone had to program them all in based on a table and graphics I provided as "presets". I also supplied 3 sliders for RGB for manual control of each color.

The easier one I did was emulating the credit card style IR remote on a iPad for a friends custom project. Learn the codes, place the emitter and done.