Our documentation team has written up a really great new step-by-step TechNet wiki article on how to create a Cloud-Based Chargeback system using System Center by combining data from Virtual Machine Manager and Operations Manager into the data warehouse in Service Manager.  Chargeback is a key scenario for any cloud operator whether it is an internal private cloud run by an IT organization or a service provider running a hosted cloud.  These tools will really help cloud consumers understand the costs and utilization of the clouds they are using.  That can help make smart choices about how to use resources and save money.

http://social.technet.microsoft.com/wiki/contents/articles/13427.chargeback-a-scenario-example.aspx