I was searching for information about the new experimental tool for ESX 3.5 VMDK Recovery Tool and I found a great knowledgebase article at VMware. VMDK Recovery Tool is a tool to recover VMDK files if they become deleted, or if the VMFS datastore gets deleted or corrupted. There are some limitations to the tool:
The tool is experimental. Experimental means that the tool is not supported and might not work as expected in all customer environments.
The tool is not available for ESXi.
You cannot restore from multiple block list files.
Unfortunately, currently at home I only have ESXi running and I have no customer running U3 already. Anyone who tried VMDK Recovery Tool yet?