I just spotted this new free download from Microsoft which will be very handy for Microsoft network admins.
“In Microsoft Visio 2007® diagrams, appropriate data can be attached to the shapes depending on the nature and domain of the diagrams. Visio Add-In for System Center allows IT professionals to visualize data from the System Center Operations Manager (SCOM) and System Center Configuration Manager (SCCM) by generating the diagrams for each machine configured for it. The Add-In allows filtering of data, automatic generation of diagrams and an automatic refresh of the associated data”.