Airport ALM 1.0 (Mac)
Source: aelius productions
Airport State ALM is an Apple Location Manager Module. It will turn your AirPort card On or Off when you change location. I'm not totally sure why Apple didn't write this themselves. It turns the Airport card on and off using the Airport Scripting Application. This makes it a little slow (but faster than AppleTalk and TCP/IP !) but Apple (to my knowledge) have not released the details of the WirelessAPI library.