Van,
It won't be any different than the stuff we have now. It should be easier. One or two lines in from the dish, a box that holds the main board and hard drive. Then you have 1 cable run to each tv. The main box could go anywhere, crawl space, attic, or a utility room. Only houses it would be more difficult are complete finshed with no wires at all, or old farm houses.
At each tv is a small box that has your connections (HDMI, RCA, S-video, and F) and a power hook up. The main box gets it's power from the small connections box, kind of like the power inserter for switches. No more problems with remotes not reaching the main receiver because the antenna is built into the connection box as well.
This is just a pipe dream of mine. It should be easy enough to develop though.
Van I know what you are talking about as well. Basically a 4 tuner box like what we have now.