SharePoint Site User Directory is a very useful user management tool which offers the follwing features:

* Display SharePoint site users in a navigational tree alphabetically, by Organization Unit(OU), by site, or by online status;
* Display whether user has been active in SharePoint within a 5-minute timeframe;
* Define and organize AD properties in customizable tabs (able to add, remove, and rename AD properties/tabs);
* Search for specific users by names;
* Display and print user profile information.

More information about this product please visit SharePoint web part

Looks nice, but it would cost us nearly a grand a year to have it! Seems extortionate considering most of the functionality is available within other tools. Would be a nice to have though