Note: This post has been amended as I originally stated that SCCM was at RTM - apologies for the confusion
As Rob Marshall mentions, System Center Configuration Manager (SCCM) is now in the Release Candidate 1 (RC1) state - it's the replacement for Software Management System (SMS) v3.
The folks in marketing would probably shoot me for stating that SCCM is effectively SMS v4 as the product takes a much broader view of the environment.
You can download a copy for yourself via the Microsoft Connect website..
Rob includes the following description on his post:
"With major investments in simplicity, configuration, deployment and security, Configuration Manager 2007 dramatically simplifies system deployment, task automation, compliance management, and policy based security management allowing for increased business agility."
Rob was the founder of the Windows Management User Group and is joined by Cliff Hobbs, David Scambler and Gordon McKenna as leaders of the community.