Scott Gibson has created LightingPi, a software library which will allow you to create RaspberryPi-based hardware devices that can be controlled using standard theatrical lighting protocols, such as DMX512. He writes:

As a companion to my pixelPi software and I’ve started work on an output device which works with OLA (Open Lighting Architecture).  This allows the Raspberry Pi to be use to control; servos; dimmers; relays and pixels (via pixelPi) all controlled over standardized lighting/prop control protocols supported by OLA.  This would essentially be a configurable node which drives hardware and can be controlled with Artnet; E1.31; ESP Net; Pathport; Sandnet; Shownet.

The example outlined in his post uses our 16-channel PWM driver board, our RGB LED pixels, and our addressable RGB LED flexi-strip. You could also drive our non-addressable LED strips with the PWM board.

Check out his post for code and more info!