Another way of looking at oil...
This map uses old (2004) data and there are questions about some other types of reserves (see comments), but I think it helps put much of our energy debate in perspective. (Click on map for larger image)
So many of our energy ideas fail the reality test. Simply put, oil is incredibly energy-dense, easy to process, and still relatively cheap. It is going to be very, very hard to produce the kind and amount of energy we are getting from oil from other sources.