System Center 2012 brings along a lot of new capabilities that make it a compelling solution for our customers. And with new technology, IT is faced with upgrading and deployment. One of the best resources I have seen around everything Configuration Manager 2012 is at - http://social.technet.microsoft.com/wiki/contents/articles/7075.system-center-2012-configuration-manager-survival-guide-en-us.aspx
It is broken out by Getting Started, Migration, Clients, Reporting, Developer Resources, Step by Step Guides, etc. I hope you find this information as useful as I have. Enjoy.