iAirport is a tool that leverages information from both the Mac OS X system-tool iairport as well as the debug logs located in /var/log/wifi.log.
It displays the information to give you a clue on how the laptop is connecting and roaming in enterprise networks. It also gives you live information on much data is going through the Wi-Fi NIC as well as how much data was transfered since the script was started.
Run iAirport with the -h or --help flag to get extended information on the command.
It is recommended to enable wireless debugging on the system to get the most out of this script, but it is not necessary.