"The essence of the problem: There is NO ready substitute."*
Reports are in from The Oil Drum on the ASPO-USA Conference that took place Nov 10-11 in Denver. By all accounts it was an excellent event, with high caliber speakers and a fruitful mix of perspectives. If you only have a little bit of time to research the latest thinking by experts in their field, check out Stuart Stanifords great coverage (with pictures) of Thursday and Friday.
ASPO-USA has also put up the Powerpoint slides of the various speakers. You can also get audio highlights of Day 1.
Rather than pull selections for you to read, I encourage you to go look at the overview yourself. Good stuff.
*The image is from Roscoe Bartlett's keynote presentation.