I'm routing Sky via a Neet HDMI to Cat6 (here http://www.amazon.co.uk/Neet®-Extender-network-Whiteline-cables/dp/B002ECYEYA) from the lounge upstairs to a plasma in the master bedroom. The route is (roughly) 15 to 20m max. There will be a few runs of this to other rooms, up walls, under floor...