Forbes Guthrie just wanted to let everyone know he moved:
I've moved. vmreference.com is so old school. I've decided to "keep up with the Joneses", and become hip with the new vReference moniker. After VMware decided to rename everything, I thought it might be a good idea to go with the flow.
www.vReference.com
Forbes is currently working his way through all the vSphere4 documentation, he hopes to have the vReference reference card for version 4 ready in the coming weeks. He plans to create a brand new one, and maintain them both separately. In the meantime, you might want to check out his growing vSphere4 notes.