NearBio is a free service to help you find biodiesel when your tank is getting low. It's easy to run biodiesel when you're driving in familair territory but what happens when you take an extended trip and you would rather not run a non-biofuel?
NearBio of Nevada City, CA, updates their database of biodiesel filling stations every day. You can get the information by going to their website on a computer or a cell phone with Internet access or on your phone with text messaging. You'll get a list of stations near your location, driving instructions to find them and GPS coordinates, too.
Even with the rapid growth of biodiesel, filling stations are a bit difficult to find. As time goes on and more biodiesel pumps appear, this type of service may be less necessary but for now, it looks really useful.