For our anniversary, BD gave me a Squeezebox Duet. We got it set up over the weekend, and it is great! The Squeezebox connects to your Wi-Fi network and your home audio system to play all of the audio files stored on your PC over your home stereo speakers. It also connects to any music services you subscribe to (Pandora, Rhapsody, iTunes, etc) and all of the Internet radio stations, including any local stations that stream music. Very cool!
It was relatively easy to set up; we did have one issue with the firewall on our router blocking access, but that was simple enough to resolve. At our house, the controller works from every room - even from upstairs. If you would like to have access to all of your electronic music files on your home system, we recommend the Squeezebox!