Anyone have an Airport Express for listening to iTunes wirelessly on their stereo? I've been thinking about getting one recently. Currently, I connect my iPod to the stereo with an 1/8"-to-RCA cable. Having done that a few times, I'm thinking having an AE to talk directly to my MacBook Pro (or my wife's Mac G5) would be easier. But I don't know much about how the system works and if it's really worthwhile.