If you are a member of TechNet, there are some white papers written on this.
It looks like my Live id gets me into TechNet.
Any specific document references that you know of?
Technical Resources --> Web Seminars & Podcasts
Windows Monitoring to Maintain A Healthy FileMaker Server
Optimizing Windows Operating Systems for FileMaker Server
Server Configuration Best Practices for FileMaker Server
Technical Resources --> Whitepaper & Technical Briefs
FileMaker Server 9 Configuration Guide for Windows and Macintosh