This post from Travis Broughton gave me a good laugh:

Recently, a colleague and I spoke to a group of IT administrators in Washington, DC. We left our car in a self-park parking lot in which the attendants had everyone leave their keys in their car, in lieu of keeping them on a valet "key board". They seemed to be depending on reasonably honest customers (we were in a secure area past a government checkpoint) and their own memories to ensure no cars were "lost". We returned to find that the parking lot attendants had completely rearranged the vehicles. Since it was a rental car, it was hard to describe the car and therefore hard to find. (By this point you're probably thinking that I've posted to the wrong board or that Intel pays me by the word, but bear with me)

It took a rather lengthy iterative search, but we eventually found the car. As we walked, my colleague and I joked about this as "parking lot virtualization". Our vehicle was moved from one slot to another to better fulfill the changing needs of the parking environment over time. This struck a chord with us, having just been discussing some of the challenges with virtualization.

There's more to the post -- unrelated to "parking lot virtualization" -- that you can read here.