Here's another new CAT5 AV distribution product range from Keane Electronics...
"A brilliant new product even if we do say so ourselves :-),the Keene C5KDA is a 4 way distribution amplifier with built in CAT5 conversion, It takes in s-video (or composite) and audio and electronically splits the signal into four identical outputs. It then converts each output signal so you can send it via CAT5 cable to the remote receiver where it's converted back into video and audio. CAT5 cable is cheap, thin and flexible so with this device you send the signals up to 100m at high quality and low cost. There's even IR feedback built in so you can control the source equipment from each remote location. Available now in kits with two or four remote receivers...