Yesterday I updated via software update and airport went a bit screwy. Today I cannot turn airport on having disabled it to save battery life. Anyway talking to a apple tech right now and she just found it may be an update problem. So don't update if it is still there and if you all ready did don't turn Airport off lest not be able to turn it back (what she advised me), even though.... Ok now I'm talking to a techier tech He says working on a fix... Says this only happens with this update when restart the computer when airport is off. So I have airport up... I had to delete two plist files and reboot (file names com.apple.airport.preferences.plist and preferences.plist) these files in hard drive then library then preferences then SystemConfiguration. Anyways i deleted the files the empty trash then reboot and airport is now on and I can connect all is well just thought you all might like to know and not have to call tech support like I did.
Peace,
Jameel
Peace,
Jameel