Microsoft SharePoint Administration Toolkit v3.0 x86 - Facts & Features!

The SharePoint Administration Toolkit available as a downloadable .exe from MS contains functionality to help administrate and manage MOSS and WSS 3.0 servers.
http://www.microsoft.com/downloads/details.aspx?familyid=412A9EF1-3358-4420-B820-0CA3F4641651&displaylang=en

The toolkit contains functionality to diagnose performance issues, perform bulk operations on site collections, an Stsadm operation to update alert e-mails after the URL for a Web application has been changed, and a User Profile Replication Engine tool.

For MOSS'ers since 1820 :) here are the new features:
The SharePoint Diagnostics tool provides administrators with a unified interface for troubleshooting SharePoint Server performance issues. Use the tool to collect data from performance counters, ULS log files, IIS log files, event logs, and WMI (Windows Management Instrumentation), and then display and analyze the data in snapshots and custom reports.

The setup program is updated to work gracefully with User Access Control
ps: You no longer need to manually run as administrator :)