Have you heard of Microsoft IT Showcase? This is a set of content (articles, videos and web casts) that shows how we internally plan , deploys and manages our infrastructure. Some of the latest ones that could be of interest are:
Security Monitoring on the Microsoft Enterprise Network: The Microsoft Enterprise Network is one of the world's largest and most prominent networks. Learn how Microsoft monitors the security of its network and responds to malware and suspected intrusions or policy violations.
Virtualization Moves Data Center Functionality to the Branch Office: Do WAN access issues and costs keep you from providing the datacenter services in branch offices that benefit your corporate users? Learn how Microsoft IT uses Windows Server 2008 R2 and virtualization to deliver datacenter functionality to branch offices. Services at the branch office level include file and print management, offline folder redirection, operating systems and application distribution, and patch management. This has significantly improved service availability, lowered management costs, and reduced servers.
The Showcase team also have their own topic area on TechNet EDGE , take the chance to watch and comment on videos.