I'm trying to get a connection between my iMac (ethernet) and powerbook (airport), and called applecare today about it but they couldn't figure out why I couldn't connect the 2 computers. They are supposed to call back tomorrow, but the guy told me that technically I'm supposed to buy an Apple base station. We have a yahoobb modem, and it worked before. But not now for some reason. By the way, I have no problem connecting from the Powerbook to the iMac. I've tried "connect to server" using the ip address, and browsing etc...but no luck. Any help?