Ok, so I have a C2D Macbook Pro and a C2D white iMac. On both machines, I connect to my (Comcast) Motorola SURFBoard modem through an older model 802.11g Airport. For the first 6 months or so that I had the iMac, everything worked great. I'm very happy with the speed, etc. My Macbook Pro continues to work very well with the Airport, but my iMac, it seems, has gone bad. The connection drops out constantly. I can connect to the internet, but after loading 3-4 web pages, I will suddenly get disconnected. I can connect again, but the process just repeats. I've looked all over the internet and tried everything--nothing works. I have tried changing encryption--I've even tried no encryption, but nothing has worked. Meanwhile, my Macbook Pro continues to be able to connect just fine. I'm about ready to give up and go get a new Airport card for my iMac. Does anyone have any other ideas?