Homegrown Wireless Media Servers?

blurg64 asks: "I am about to move into a new house and am keen to be able to stream my mp3 collection out to my stereo. With all of the new media servers out there such as the Squeezebox, cd3o wireless network player and even HP's Wireless Digital Receiver offering, I was wondering if any /. readers had any tips or experiences in building a cheap wireless media server?"