Enlightenment and lighting controls
computer.rip
computer.rip
I'm personally about to experiment with DALI and zigbee-DALI bridges. Unfortunately, DALI seems more of a European thing, so finding suppliers as well as 120V-capable hardware is trickier (but possible).
Using a clock to mux multiple digital bitstreams seems like a natural fit. Using one to mux analog signals seems strange to me, for no rational reason I can point to.