Built my sign with bamboo and acrylic cuts. The electronics consist of an Arduino Pro from Sparkfun, AsyncLabs WiFi Shield(no longer selling), and several RGB LEDs.
Also built an iPhone app that connects with the shield when it's broadcasting a network. I simply connect, start up the app and pull the pedals.. The app sends the RGB values. Next step is to add a pulsing library so that I can setup a pulse sequence from the app. This was my first Ponoko project, man was I happy.