With the rise of spotify I was looking for a way of playing music via my home audio system without having to move the laptop and plug it into the amp.
As my xbox is already plugged in and is my music player of choice I googled a way of getting spotify to play and came across this software;
http://www.sdstechnologies.com/
QuoteIntroducing A Better Server For Networked Home Audio
Want to listen to satellite radio on your PlayStation 3? Or tune in to Pandora or Spotify stations on your Xbox 360? How about playing your DRM-protected music in the living room without Windows Media Player? Introducing Jamcast -- a home media server that makes these things possible, and a whole lot more.
The beta version of Jamcast is free to download and use (registration is required).
I've yet to try it out, but if it does what it says, it'll be fantastic :)