Got an email from my boss about a microcontroller interface to a C-BUS device. Did some googlin' and found some info but it doesn't sound very microcontroller friendly.
Looks like it's a interface for home control developed by Clipsal Integrated Systems. They talk about PCI cards, .DLL and drivers for the PC.
Don't want to sign my life away to get more info right now. I am hoping somebody has some good information that they are willing to share.