http://theoildrum.com Perhaps the premiere site for the determination of the peaking process as it unfolds.
http://globalpublicmedia.com/INTERVIEWS interviews concerning peak oil related issues
Earth Spirit Earth Crash: Healing Ourselves and a Dying Planet (Source
Material on Ecosystem Destruction & Collapse, Loss of Biodiversity, Endangered
Species & Extinction, Global Warming & Climate Change, Pollution, Over-population)
Association for the Study of Peak Oil
Technocracy: a "scientific rational" approach to society's dependence
Mission: assemble, study, and disseminate global oil supply data
A collection of expertise on the Peaking of Oil, in memory of M. King Hubbert.
Famous and extensive site on the Peaking of Oil: from the perspective of Scientific
Materialism, leading to utter despair.