So lots has been going on with PixelPi since my last update:
I've forked (https://github.com/mostley/PixelPi) github fork into the PixelPi/PixelPi trunk. It significantly changes the architecture of the project. Now there is a simple controller.py file which simply receives pixel data (currently raw (pixel invaders) type;
I have added on proper IP protocol support using OLA Open Lighting Architecture. This allows support of standardized lighting protocols and allow you to control your pictures from many more applications.
There is now a shim layer which interfaces the output of OLA to the pixels; I'm still learning about the OLA package; its quite impressive and I think it will suite these needs perfectly.
I've added support for grouping pixels so they can be controlled with a single group of RGB DMX data.
So right now the new pixel pi implementation is missing much of the test mode stuff in the original. I'll be adding it over time.
Issues and contributions:
I've added an issues page to the PixelPi github page; please feel free to make a new issue for any changes, bugs, enhancements.