This weekend, Apple released Airport Utility 6.0 for Mac OS X Lion.
Oh, and it looks just like the utility for iOS.
After playing with it for a bit this morning, I really don’t know why Apple updated Airport Utility. The new UI isn’t consistent, and doesn’t really add that much, except for the “map” view at launch. Parts of the more standard UI have been slimmed down, but there’s not much new to use, as far as I can tell.