I am totally excited about my new home entertainment system. It uses a standard digital satellite dish along with an external FireDTV (Digital Everywhere) digital TV receiver connected to my more or less frumpy desktop PC. The computer runs Windows 7 RC with Media Center configured to use the satellite box.
My living room is equipped with a Xbox 360 connected to the TV. The Xbox 360 and my desktop PC talk to each other via powerline AV ethernet connection (since I totally forgot to put a system of conduits in my home).
Along with the TV signal the Media Center PC also hosts all my media (music, pictures and videos).
Have a look at the picture attached to get a more detailed overview of the system.