The main points about biodiesel have already been covered, but I wanted to share a few links I've collected, including the one about making a sample of biodiesel to test a proscpective WVO source you may run across.
My wife's contacts would provide me several sources of WVO and I plan to get the diesel model Jeep Wrangler when it comes out and convert it.
There's a conversion nicknamed "appleseed" which uses an old water cooler as the core for the processing of WVO into "refined" biodiesel.
Biodiesel Appleseed Reactor Plans
Appleseed Processor Kit - Utah Biodiesel Supply
Biodiesel Conversion Kits, Processors and Equipment
Biodiesel FAQ & Info - BioDieselNow - Renewable biodiesel fuel
biodieselpictures.com :: View topic - Biodiesel from John R in the UK
Some vids are also on this page:
Getting Started Making Biodiesel - Utah Biodiesel Supply
Media Coverage of Smarter Fuel
World Famous Dr Pepper Wash Technique (Pat Pend) - Topic Powered by eve community