I had dinner in Seattle (three words: bacon-wrapped-steak) with the folks that put on "How Microsoft Does IT" (get it? Does "it", "IT"? OK, I'm easily amused) and I wanted to point out this fantastic resource to you - again. I rave about it all the time, because before I started at Microsoft I worked at shops large and small, and many times I was called on to come up with strategies and architectures for my organizations. And what better place to start than the people who wrote the software, and use it in their business every day. There are so many references there you'll never get through them all.
If you're not familiar with the site, it's a great compilation on how we at Microsoft run our IT infrastructure - Windows, Office, SharePoint, Exchange, SQL Server, Biztalk, the whole thing. If you don't have it bookmarked, definitely go check it out. There's a DVD you can order as well, and we keep the site very up-to-date and current.
The link is here: http://technet.microsoft.com/en-us/library/bb687780.aspx