So I'm at my mother's for the holidays, setting up a wireless network for her with an Airport Express and her cable modem. The network is just fine - that's what I'm connecting on with 3 bars on the airport signal on my 15" PB. I installed an Extreme card in Mum's iBook (the revision immediately before the ones with Airport already installed), following all the instructions and it all seemed OK. I used the iBook to set up the network although I was only getting 2 bars while right next to the base station. But now I'm getting nothing on the iBook - tho the PB is just fine. Do you think it's an antenna problem? Should I try reinstalling the card? Any other thoughts?