RuggedCircuits:
You've got pins 4 and 8 reversed. Pin 4 is ground and pin 8 is VCC. Also, all your LED's are reversed.--
The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, speaker, microphone, light sensor, potentiometer, pushbuttons
Thanks for that, I was looking at a physical circuit I used as a reference upside down, which is why I had 4 and 8 reversed.
I fixed the schematics... I updated using the fritzing (RGB LED) symbol but I really mean the RGBstrip. I mainly want to know whether using a zener to drop 12V to 3.3V is worth the effort and current loss, or should I just use a separate ~3V power supply for the uC.