I researched biodiesel a little bit and discovered that you do not need a specially built new car to use this fuel. You can run biodiesel in any diesel car, and more stations are becoming available that offer this fuel. Some people are making their own biodiesel from waste oil, though currently the biodiesel available in Seattle is not from recycled oil.
Here are some resources:
And, check out this delivery service ad I saw on Craigslist - this could significantly reduce the price and make this fuel more accessible for drivers.
I plan to purchase a diesel car in the next several months and use biodiesel exclusively. It's likely not a permanent solution, but it will significantly reduce my own CO2 contribution. I still plan on cutting down on driving as much as possible.
I will write more when I have learned more. Meanwhile, here are a couple other links I think are valuable:
Green Car Congress
Keep the faith, everyone. This road is long and difficult, and these lifestyle changes go against all our cultural programming, but it's the most important cause of our time. There is no more time to waste. Ask yourself this: if your grandchildren's grandchildren were standing in front of you, would you open their mouths and pump pollution into their lungs? Would you hand them a glass of water too toxic to drink ... or deny them anything at all to eat or drink? Would you place them in a environment laden with carcinogens and watch while their cancers develop? These are horrible, incomprehensible scenarios to envision ... but we are approaching a world like this at an alarming rate. If you don't believe it, ask a scientist.