Our very own Steve Rachui just posted a cool how-to on setting up connected management groups in Operations Manager 2007. If you're not familiar with the concept, this allows us to create a 'single pane of glass' view of an OpsMgr environment with more than one management group. As Steve says, this is the OpsMgr answer to the MOM-to-MOM connector available in MOM 2005.
If this is something you'd like to do then head on over and check it out. You can find Steve's entire post at http://blogs.msdn.com/steverac/archive/2009/02/10/configuring-connected-management-groups-in-opsmgr-2007.aspx.
J.C. Hornbeck | Manageability Knowledge Engineer