WS2801 Raspberry Pi Bridge
The metalab received a Rasperry Pi care package from adafruit and because we really dig blinky things we made a WS2801 controller for the Raspberry Pi.
Its a simple shield that you can attach to your Raspberry Pi that functions as a bridge from Raspberry Pi to control a wide variety of WS2801 based Ledstripes and Pixelmodules at different voltage levels.
You can make your things go blinky from python or C/C++ without the need of a separate microcontroller.
It uses the internal /dev/spi0.0 provided by the Linux Kernel to talk to the Bridgemodule.
And because this is awesome, we made a kit out of it that you can purchase for 10,- on the hackerspaceshop.com