rlsmith999 - Although the Toolset has some discovery capabilities, baseline + alert on inventory changes is not really within the scope of the Toolset (which is more of a realtime diagnostic and troubleshooting too), you may want to have a gander at our LanSurveyor product...
I am evaluating that product (a little pricey if you add in the Responders).
It does not quite do what I want. Although it does scan, create a baseline, and report "changes", it scans through ALL the subnet ranges that are discovered.
What I would REALLY like to find is a product that can pull/poll the SNMP information from the Routers and Switches, correlate that information with the "Baseline", and report on any changes (New device on a switch port, etc.)
I would think that this would not be hard to do, all the basic information is in these devices... That would lower the scan from over 100,000 "nodes" or IP addresses, to approximately 200 Routers/Switches on our network.
This would allow us to scan at a 5-10 minute interval rather than a 5-10 HOUR interval, more of a "real-time" check of our network.