so does this mean that all i have to do is simply plug airport express into my hifi and it will automatcally sync with my existing wireless network?
"If you already have a wireless network in place, you can use AirPort Express to add music to its capabilities. Let’s say, for example, you have AirPort Extreme set up in your den. There’s no need to scrap this setup and create a whole new one with an AirPort Express Base Station, your DSL or cable modem, printer and stereo all in one place. Simply connect AirPort Express to your stereo in your favorite music room and plug it into an electrical outlet — it wirelessly links to your existing network, letting you play your music in your room of choice without moving anything or connecting anything else."