Looks like Service Pack 1 for System Center Essentials released yesterday so if you happen to run one of these servers you'll want to check that out. Here are some of the highlights:
Service Pack 1 (SP1) is an update to System Center Essentials that provides enhancements based on customer and partner feedback. Some of the improvements include: Up to 70 percent less memory consumption, and faster UI, support for workgroup joined computers, SNMP v1 devices, improved setup, new update approvals rules, enhanced third-party update experience and support for Windows Server 2008.
For more information and to download SP1 see http://technet.microsoft.com/en-us/sce/cc304525.aspx.
J.C. Hornbeck | Manageability Knowledge Engineer