The work being done with Algaes is really promising, and from what I have read the algae cell is 1/2 Lipids(veggy oil), and the rest could be used with some of the cellulosic pocesses under development. The technology exists to refined oil into BioD in large quantities, there just aren't many refineries YET.
BioD is the only realistic bridge from what we have to what we may go to. Plus with BioD you can still have a lifted, bombed, compound turbo, 500 hp diesel tow rig, AND be green(ish).
