I understand this site has become quite helpful to biodieselers.

I've found the Frybrid site to have the most up to date info on SVO as a fuel available. Check out the VO Theory, Resources, History, etc sections. Good info with lots of references and back-up's for the ideas presented. The forum is full of contributors (mostly DIY'ers) who are quite helpful AND knowlegeable. For the most part, the other sites are 'behind the times'...