Powered by Sparkfun RGB LED Matrix Backpacks, I am building 8, 80x80" grids. I have to paint the insides of half of them a glossy white still and then run the wires for the other seven, but the one I got running came together quickly using MTA IDC connectors and some ribbon cable.
It is currently running visuals from a custom max patch. All of the code and documentation it on this page: http://ibrill.com/blog/?page_id=441
A description of the work is locate here: http://ibrill.com/blog/?page_id=361