Revamping the Security Bulletin Release Process:
"Security Bulletins Expanded and Summarized by Product

Tools & Resources

The most significant change that the new security bulletin process will introduce for customers will be in the number and timing of security patches. Consequently, customers may need to revisit some of the processes they use for deploying patches. The following tools and resources will help customers evaluate, plan, manage and deploy security patches:"

http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/revsbwp.asp