I was given some advice by someone who installed home automation systems a while back. He told me to always run in twice as much as you think. I think this is good advice because in bulk cat5 cable is cheap and easy to install when the plaster isn't on.

The systems you plug in will come and go, but you will still need that cable in the wall. I worked in one guys house that wired cat 5 to each light and mains outlet, just in case. His central comms room looked bonkers, but when I came to install his broadband it was all there waiting for me.

That looks like one impressive system, what sort of price bracket is that in?

Cheers

Cris.