From Microsoft (via Susan Bradley):

Microsoft Office Visio 2003 Connector for the Microsoft Baseline Security Analyzer (MBSA)

Securing your network has just gotten easier. The Visio Connector for MBSA lets you view the results of a Microsoft Baseline Security Analyzer scan in a clear, comprehensive Microsoft Office Visio 2003 network diagram. You must have both Visio 2003 and the Microsoft Baseline Security Analyzer — a free security tool from Microsoft — for this connector to function.

This is definitely a great tool to help SBS or other small/medium network administrators keep track of which servers and workstations are behind on their patches.  Heck, those of us with more than a machine or two at home could get good mileage out of this as well - and yes, it's free.

- G