Biodiesel is a domestically produced, renewable fuel that can be manufactured from vegetable oils, animal fats, or recycled restaurant greases.
Ethanol is a renewable fuel made from various plant materials, which collectively are called "biomass." Ethanol contains the same chemical compound (C2H5OH) found in alcoholic beverages.
For a technology overview try:
DOE Biofuels Technologies Website:
For biofuels industry news try:
Biofuels International - http://www.biofuels-news.com/industry_news.php
The National Biodiesel Board - http://www.biodiesel.org/
Biofuel companies in Austin to reach out to for more information include:
Sustainable Biodiesal Alliance - www.sustainablebiodieselalliance.com