Apple has posted an update for its Airport Extreme base station, bringing its Firmware to version 7.2.1.
The AirPort Extreme Base Station with 802.11n* and Firmware 7.2.1 is Wi-Fi certified for 802.11n* draft 2.0. This update also includes bug fixes and security updates.
This update requires AirPort Utility 5.1 or later. If you have AirPort Utility 5.0 installed, you can update to AirPort Utility 5.2.1 by installing AirPort Base Station Update 2007-002:
AirPort Base Station Update 2007-002 for Mac [1]
AirPort Base Station Update 2007-002 for Windows [2]
AirPort Utility 5.x can be installed using the installation CD included with the AirPort Extreme Base Station with 802.11n*.
For detailed information on the security content of this update, please visit this website: http://docs.info.apple.com/article.html?artnum=61798 [3]
The update weights 4.6MB and is available either through the Software Update Utility or through Apple's support web site [4].