There are some new features in the SDK release that goes along with ESX 3.5. The VMware Infrastructure Web Service API on VirtualCenter 2.x or ESX Server 3.x. Latest Version: 2.5.0 | 12/10/2007 | Build: 64154 gives access to Managed Objects like the FileManager, VirtualDiskManager and ViewManager. Alltough these objects are still experimental and subject to change in future releases they give us great possibilities. You can get the VMware Infrastructure SDK 2.5.0 Sample code, documentation and the WSDL for developers using at the following link:http://www.vmware.com/download/download.do?downloadGroup=VC-SDK