Energy Information Administration (EIA) website is a great resource on energy-related industry.
EIA website
It has a lot of information on different types of energy sources:
petroleum
natural gas
electricity
coal
renewable & alternative fuels
nuclear
"Forecasts & Analyses", "Geography" are very useful too.
International Energy Outlook 2008 (published on September 2008)
link to International Energy Outlook 2008
PDF file:
PDF file
