Here are some Online Technical Security resources that will help you keep up with Microsoft Security Innovations
The Microsoft Security Newsletter is a monthly electronic newsletter that's tailored for IT Professionals and Developers to provide the latest Microsoft Security news together with tips for getting the most from our products.
The Security Webcast Calendar includes details of live webcasts and on-demand webcasts - they are all free of charge (of course) for you to access. The technical level of depth is generally pretty good.
To whet your appetitet there's a level 300 (deep technical) session comming up on Windows Vista's User Account Control, and one covering How Microsoft IT does Threat Modeling.