SolutionMan, I like that.
I'm still playing with the LED support board, iteadstudio is still closed so there's time.
I like the 10x10 because it will a lot less money - 10 x 13.2 jumps way up in price.
The other board has Arduino function built right in - just connect an FTDI Basic, FTDI Cable, CP2102 module for a USB interface.
Or, build it up with shift registers & caps, and connect arduino SPI wires to the correct pins.
$5 gets you a bare board.
I can assemble one for you, we'd have to discuss specifics on parts, as I mentioned on Reply #143.