Just a quick post to share some links for visio shapes for some System Center 2012 products
ConfigMgr 2012 – http://gallery.technet.microsoft.com/SCCM-2012-Visio-Stencils-166257b0
Service Manager 2012 – http://blogs.technet.com/b/servicemanager/archive/2010/01/04/service-manager-shapes-visio-templates.aspx
OpsMgr 2012 – http://www.systemcentercentral.com/scom-2012-visio-shapes/