Apple published 2 manuals dedicated to the new AirPort Extreme 802.11n:
AirPort Extreme (802.11 n) Setup Guide (Manual)
Designing AirPort Extreme 802.11 n Networks (Manual)
The first one describes how to install and plug the new base station, while the second one, more interesting to our point of view, unveils part of the new Airport Administration Interface.

It seems to be a real improvement compare to the current one, as it appears simpler to manage its Airport Extreme Station.
This new administration panel should be included together with the station itself, and be available in a near future via a software update as it supports all Airport base stations.