Ok, i'm getting so annoyed with this. I have a 17" powerbook. I have a Airport Express. Some days, it cannot hold a wireless internet connection for more than an hour straight, and when it drops it, it won't re-pick it up until i cycle power on the wireless card. The airport is physically located 8 feet away, line of site, oriented upsidedown. Every so often, iTunes music drops out for a few seconds, other times, I have to select "Computer" in iTunes, then the airport express to get it to play again. I've switch the Airport Express to all 802.11g, and have cycled through all 11 channels, plus automatic. There is no encryption or anything else complex. Signal strength constantly shows 3 or 4 bars.