Biodiesels using Organometallic catalysts

A while back, I stumbled onto this article about the production of Biodiesels using Organometallic catalysts.

I am unable to find any specifics about the process.  Has anyone tried it?  

http://www.biodieselmagazine.com/articles/500/the-ethyl-biodiesel-alternative

That's interesting!

The referenced article is about 14 years old ... and although I'm not tied into the BD world anymore (yay, electric car), I'm certainly not aware of a sea change like this.  But it certainly has the potential to make BD very green and totally non-dino.