Airport Extreme is Apple's name for 802.11g wireless networking(much easier to remember)
To get your new iBook working wirelessly, you need a ethernet internet connection (via a cable/DSL modem usually) and a wifi router.
Apple offer 2 wifi routers
- Airport Extreme Base. This looks a little like a flying saucer and is more expensive than option 2
- Airport Express with Airtunes
The Extreme is more expensive but can allow up to 50 users online (the Express can have only 10) and it has a LAN port so that you can have a wired sharing the connection rather than just broadcasting in wirelessly.
The Express has a audio out port which you can wire to your stereo and listen to iTunes through your stereo.
Both the Express and Extreme Bases have a USB port which you can attach your printer to and print wirelessly.
The other option you have (particularly useful if you don't already have an ethernet modem/router) is to buy an all in one wifi modem/router - or if you have a modem, a plain wi-fi router. Third parties like Dlink, Netgear and Belkin all make routers to the 802.11g standard which should be compatible with your iBook. These offer different features - more wired ports, are unlikely to have the USB printer slot or the Airtunes but are often cheaper.
If you want to print wirelessly and listen to your music remotely, then the Express is a great buy - particularly if you're in the US at the moment when you get free iTMS songs with it.
