MS TechNet Ireland provided a link to this Microsoft website today. I’ve not seen the Windows Server System Reference Architecture site before but it appears to have been around for a while. The WSSRA site provides a collection of documents for designing a best practice Microsoft Infrastructure from the ground up. This is what MS says aabout WSSRA:
"Windows Server System Reference Architecture (WSSRA) is a detailed reference architecture, tested and proven in labs, that yields valuable implementation guidance for meeting the requirements of an enterprise. Customers can use this guidance to build highly available, secure, scalable, manageable, and reliable enterprise infrastructure. By following the recommendations in the WSSRA documentation, an organization can quickly and efficiently plan, build, and operate an infrastructure to support its long-term business needs".