Hands down this is one of the coolest tools I have seen at TechEd. It will make my SharePoint admin life MUCH easier.
The Dot Net Factory‘s SharePoint Explorer is a great IE add-in for SharePoint navigation. You can quickly add a SharePoint site to the navigation and then have super quick navigation tree access to areas, subareas, admin settings, etc… For any SharePoint environment with multiple portals and/or WSS sites, THIS IS A MUST!!! It centralizes all your sites into one easy location!