Sorry, I forgot to link to it in the original post. There is a description of the build at: http://thecolorofthin.gs/post/254188895 ... a-led-wall
If there are questions about something I don't go into detail on, let me know.
@driverblock: Thanks! My intentions were to make it somewhat psychedlic and I'm glad that came through.
@anstone: I am planning to post code but havent' had time to clean it up well enough to put out there. Hopefully it will happen soon and I'll post an update here when I do. In the meantime, on the subject of touchOSC, it's quite easy actually using the Processing lib oscP5 from Andreas Schlegel. You do some dragging in the touchOSC editor to make the layout, then you write some simple string parsing code to interpret the OSC data parsed out by oscP5.
@domorethanyoucan: The refresh rate is about 45Hz. This is limited by the speed of Serial communication to the microcontroller. I'm not using an Arduino actually for that very reason, the Chipkit Uno32 that I ended up using supports serial communication up to 921600. Regarding brightness, it's just about the right brightness at night on full intensity but during the day it could be a little brighter. I actually had to crank down the brightness to 50% because otherwise the fan on the power supply turns out and it's annoyingly loud. I'm looking for a suitable power supply without this drawback if anyone has suggestions.