Yesterday Kevin Holman (TSP) posted a nice blog article about monitoring your ConfigMgr 2012 environment with OpsMgr. The Management Pack of ConfigMgr 2012 is completely rewritten from scratch. The ConfigMgr 2012 Management Pack has the following improvements:

• No Scripts inside the Monitoring MP
• Reduction of Code inside the MP
• Reduced number of Rules and a increase of Monitors
• Disabled work flows out of the box
• A guide and appendix as documentation is included

More detailed information can be found on Kevin Holman his blog: http://blogs.technet.com/b/kevinholman/archive/2012/12/11/monitoring-configmgr-2012-with-opsmgr.aspx