If you're interesting in using Windows Update Services (WUS) then you might consider watching Microsoft's new on-demand Webcast, "Introduction to Security Patching Using Windows Update Services." The Webcast offers insight into its new features and offers planning and deployment guidance.
Microsoft also released WUS RC1 today. Microsoft said that after April 22 WUS beta 2 will no longer receive updates. So if you were testing the beta you need to update your copy to RC1.