My Cisco Aironet card has just arrived. I've plugged it in, booted the PowerBook, entered network prefs. "wl0" interface has been created automatically. Then I clicked the checkmark to enable it. It loaded list of networks, my one was at the top (probably sorted by signal strength). I selected it, set static IP (I have no DHCP on my LAN), then has been asked for the WPA passphrase. Entered it and voila: wirelessly online in less than a minute .

This has been really easy and fast!