Almost a week after I installed AirPort at home, I figured I should test the range. My PowerBook is equipped with an Apple AirPort Extreme card, and the base station is a 3com 4-port router. I now keep all my music on the iMac, and streaming it through iTunes to the PowerBook was flawless all over the place. I could walk around on first and ground floor of the house, and I could even take it outside, wander about as much as I wanted in the garden. Swell. Summer here I come!