I'm going nuts! This is the second bike project that has completed lately and I'm still neck deep in mine! Talk about motivation. 
I love the LED matrices. Looks like they provide a good long-distance visible area - and RGB at that. I wanted to do a tail light for my project, but all I could think of were the same-old reflector like lenses and a few high-brightness LEDs pointed in all directions.
Where did you get that clear case? Is it waterproof?
Nice work!