I just installed F10 onto a 1.5Ghz Powerbook G4 15" with the same problem. Wired Eth0 works beautifully, but I'm getting no signs of life on the wireless side, although the hardware appears to be recognized/installed fine. (I am a linux newbie, so I make no promises about that.) For comparison's sake I ran lspci as well and I have this:
Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03)
No visible networks. Connect to Hidden Wireless Network doesn't work either.