Crestron, for one, has a matrix switcher that allows for distribution of either composite, s-video or component. I am sure that there are lesser priced solutions available, but it is an option without a lot of wiring. With the Crestron PVID and room controllers it can be done with 2 Cat-5's (or 1 Cat-5 and some other type of cable that will handle the Crestron network/power requirements). Plus, it gives you many other control advantages and can even use local sources for distribution depending on the room controller selected.

I'm not a Crestron dealer, so I'm sure that others would have way more to offer in this regard. I have just seen some of the things that can be done with their products and I think that they are the standard-bearer that others try to emulate.

My .02....

John