National Biodiesel Board
http://www.biodiesel.org/

California Air Resources Board
http://www.arb.ca.gov/homepage.htm

California Energy Commission
http://www.energy.ca.gov/

National Renewable Energy Laboratory (NREL)
http://www.nrel.gov/

Alternative Fuels Data Center
http://www.afdc.energy.gov/afdc/fuels/biodiesel.html

Clean Cities Program
http://www.eere.energy.gov/cleancities/

BioEnergy Information Network
http://bioenergy.ornl.gov/