A Database of Patched Software?

Midnight Warrior asks: "I am one system administrator for what is an organization of dozens of LANs. Together, we all must keep our machines patched. Now we can all watch CVE, frequent securityfocus.com, or let LWN [Updated vulnerabilities section] bring things together. LWN does a fabulous job, but I'm looking for something bigger and more personalized that doesn't require the system be on the internet. Freshmeat, SourceForge, and Google are all NULL on this question: is there a database, and scraping agents in existence that will let one person oversee dozens of OS installations, a mish-mash of software packages, and an even worse level of up-to-date patching exist so that when a new vulnerability against, say, OpenSSH comes out, I can look up which systems need to be tested and patched? My work should be limited to maintaining OS (not just Linux distros), software versions, and current patch lists. This is a classic database problem, but has someone already solved it?"