Bill Haywood [1], CEO of LS9, a San Francisco-based company that makes what it calls Ultra Clean Fuels and Sustainable Chemicals talks about the process of “brewing” biofuels. And Robin Gold, co-founder of Dogpatch Biofuels, talks about his filling station in San Francisco where drivers can gas up on biodiesel. 
Links:
[1] http://business-ceos.suite101.com/article.cfm/a_passion_for_clean_energy