Apple has released AirPort Software 3.3 via the Mac OS X Software Update preference pane. According to the release notes, this update provides “improved AirPort wireless networking software, and is recommended for all users with an AirPort Extreme and AirPort enabled computer or an AirPort Extreme base station. This software provides support for the Wi-Fi Protected Access (WPA) specification for the AirPort Extreme base station and AirPort Extreme and AirPort clients. Also included in this release is v5.3 of the AirPort Extreme base station firmware.”