My iMac has been wireless with Airport Extreme for a good time, and I get 100% signal strength as the router is right above me. I just installed Airport Extreme into my iBook G4 and I only get one bar of signal strength. My iBook is right next to my iMac. Does the Airport card take a few days to get warmed up or something like that? I remember I had to wait a few days for my desktop to finally reach full signal strength. Do two Airport-installed computers cause interference with each other when right next to each other?