I've just scratched the surface on LinuxMCE and found out about its enormous feature set. I installed it on a Mac Mini (planning to use it as a Hybrid) at the moment, so I can toy around with it...
I recently moved into my new flat and planned ahead -- the master bedroom has dedicated CAT5 (Audio, LAN) and RG58(CVBS)/RG6(DTV) cabling installed, and has its own amplifier, which is currently linked directly to my vintage Bang & Olufsen stereo receiver.
From the start, I intended to do home automation and start with the lighting. Now I work in professional PA systems, so I wanted to look into using DMX512 as a control protocol, as it can be just as useful around the home as it can be on stage.
Various manufacturers create kits for 230V (incandescent, halogen), 0-10V control voltage (for HF fluorescent ballasts) and 12VDC (LED) dimmers, and, obviously, commercial dimmer packs are readily available (albeit a bit huge).
All of my future fixtures will be LED, and controlled by RGB. To what extend does LinuxMCE have support for multi-color fixtures at the moment? Do I need to create three dimmer fixtures for each LED strip or spot in my home?
I will start coding on something that makes DMX512 work with LinuxMCE, once I get the hang of the system a bit. I have an Enttec OpenDMX USB dongle, which has great Linux support already, so closing the loop to LinuxMCE should not be very difficult.