Also, depending on the make and model of your receiver, you may already be able to connect a computer to your home theater system merely by connecting one cable. I believe both Denon and Onkyo have models that will connect to computers via ethernet connection and my particular Pioneer will connect via USB. There are others that do it differently, but those three are the ones I feel comfortable mentioning. Of course, you could also get some kind of wireless music server. My dad recently purchased a Roku Soundbridge and it connects to his wireless network and outputs whatever the computer is playing via optical digital or analog connection to the receiver.
