Apple releases AirPort Utility 5.3.1 for Mac and Windows
Tuesday, March 11, 2008 - 04:48 PM EDTApple today released AirPort Utility 5.3.1 for Macintosh and Windows which includes general fixes and compatibility updates.
AirPort Utility 5.3.1 is the simple to use, setup and management utility for the AirPort Express Base Station, the AirPort Extreme Base Station and Time Capsule.
AirPort Utility 5.3.1 is available via Software Update and also as standalone installers.
More info and download links:
• AirPort Utility 5.3.1 for Mac OS X 10.5 Leopard - 8.8MB
• AirPort Utility 5.3.1 for Mac OS X 10.4 Tiger - 9.33MB
• AirPort Utility 5.3.1 for Windows - 10.28MB

Uh, you are missing a huge point to this update... It now enables wireless Time Machine support!