Now -thats- a schematic I can sink my teeth into, very straight forward 
Thanks for the great detail.
Is there any reason that I should be doing this project by multiplexing CA instead of CC? I certainly don't want to make it any more difficult than it needs to be, however reducing the number of wires (back to the board) and TLC5940s is definitely a concern for making it easy to follow. I've set up the 5940 examples using CA, if I could just turn http://tlc5940arduino.googlecode.com/svn/wiki/images/breadboard-arduino-tlc5940_close.png into something multiplexed to require less wires, I'd be okay with using CA LEDs instead.
