VMware Labs present its latest fling InventorySnapshot. InventorySnapshot is a useful tool that allows user to "snapshot" a given vCenter inventory configuration and then reproduce it. Inventory includes datacenter folders, datacenters, clusters, resource pools, vApps, hierarchy, roles and permissions, configuration settings, and custom fields. If you have an inventory with a given set of hosts and VMs organized into a group of clusters, InventorySnapshot will reproduce the complete environment, including cluster settings and any custom roles you may have defined.
Be one of the first one to try, rate and comment - http://labs.vmware.com/flings/inventorysnapshot
To learn how to run InventorySnapshot, read this document.