Sorry if this has been discussed before but I could not find anything via search.
I have found a 16 input (emulator style) 16 output led output (RGB support) device called a ledwiz.
http://groovygamegear.com/webstore/index.php?main_page=product_info&cPath=82&products_id=306This device is USB and supports PWM intensity. Using RGB LEDs (common anode), theoretically 110,592 colors are possible.
Price is $39.95. It gets it's power via usb and reports like a gamepad for the purpose of input.
I thought it would be awesome if this device could be accessed via mach3 (brains possibly). I know the input portion would be doable with keygrab
but I don't know how the led control would we be implemented.
This is beyond my ability so I thought I would put it out there for anyone who might see it's potential.