Originally Posted by autopilot 
You can use WOL to boot/wake the PC when the Squeezebox requires music off it, then the PC will go back to sleep X minutes after you stop streaming from it. Or you could use an old PC and install linux/windows and turn it into a music server. Or you could by a cheapish NAS. Or just use Squeezenetwork and Napster.
Never used Napster. How does that work? I was looking at the NAS idea as a solution. I think this would be the most robust option.