Apple has released AirPort Utility for the iPhone, iPad and iPod touch. The free app — available at the Apple App Store — lets you manager your AirPort Extreme, AirPort Express and Time Capsule base stations without requiring a desktop or laptop computer.
With AirPort Utility, you can see a graphical overview of your Wi-Fi network and devices. You can change base station and network settings, or manage advanced features such as security modes, wireless channels, and more. AirPort Utility works with all Apple 802.11n Wi-Fi base stations.