I say it's time to really go with the bio-diesel from otherwise useless bio-mass NOT food stuffs.
Algae.. said it before and I'll say it again. Algae blows all other feed stock crops out of the water in terms of oil yield per crop.
That said, can't find my last fill up receipt, but I remember it was about $72 for the tank - somewhere in the $4/gal range Nor Cali.
Seriously, Biodiesel. Even though the pricing is going to be on-par if not more expensive than dino-diesel for a variety of crappy reasons it's still worth doing just to prevent the money from getting funneled back into the petroleum complex.
Saw a Safeway delivery rig the other day that had a big fat "Powered by biodiesel" sticker on it. No way to know what blend they are running, could be b10 just to say they are doing it for marketing purposes, or could be b99-b100. Given all of their big distribution centers in Stockton and Tracy (and access to their own waste oil from in-store deli fryers) it totally makes sense for them to go that route.
Short-haul trucking, construction equipment, towing companies, school bus fleets. So many opportunities to get BioD into the industrial/commercial sectors. Start there, start making a dent. Consumer availability will follow and we won't have seek out the 1 place in the area that actually sells it.
Personally, I'm fine with it being expensive, I just don't want it to be based on foreign petroleum any more.