<A target="_blank" href="http://www.wired.com/gadgetlab/2011/04/hack-unlocks-airtunes-private-key-allows-streaming-to-any-device/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+wired%2Findex+%28Wired%3A+Index+3+%28Top+Stories+2%29%29">Apple may not let this one last but, in the meantime, the open source Perl script Shairport</A> will let you stream your iTunes music to a variety of devices, not just AirPort Express.