If you benefitted from the white paper to which I linked in my previous blog post, here’s another that goes well with it. This one delves into the identity infrastructure capabilities that are specific to both on-premises and cloud computing and how such an infrastructure can be implemented using Microsoft solutions. The previous document is something of a prerequisite, since you really need to already understand the four pillars before you dive into this one.
http://gallery.technet.microsoft.com/Identity-Infrastructure-f19a7123/view/Reviews