LED matrix bicycle tail light (CYCLED)

One of the first PCBs I designed and ordered made was for a 8x8 LED matrix backpack. I ordered 5 matrices on ebay once and ever since had different ideas what to do with them, but always put away the project, because I just did not want to bother with all the wires and prototyping boards my previous projects were made of. And I wanted something small and reusable.
So after some time I had the idea to build a backpack for the board.

Work in progress, but at least source code is available at:
Google Code Repo for CycLed