Hi djmikeryan,
Good work on this project! I'm putting together a similar project, and would like to ask you a few questions about some of the issues you've probably solved already.
I started a thread for my project at...
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1278852236
You can find specifics about what I wanna do there, but a few questions for you here...
What's the most MegaBrites you've linked together in one chain? I plan to have 170 per chain. Do you think that's possible without latency problems?
I plan to show video on my setup, so a good refresh rate is crucial. Would I be able to refresh the whole chain at at least 25fps?
Cheers! 