Over the next couple weeks I will be updating my blog (http://blogs.technet.com/b/xdot509/) with several Windows Server 2012 PKI related posts.  In the meantime see (http://technet.microsoft.com/library/hh831373.aspx) for Windows Server 12 PKI related information.  Also, here is a recent blog posting on "Group Protected EFX" (http://blogs.technet.com/b/pki/archive/2012/10/08/group-protected-pfx.aspx), which is a new feature in Windows 8 and Windows Server 2012.