In my opinion? No. I dont see the point in it. For one, the chemicals that go into biodiesel cant be all that good for the enviroment...Secondly its really not any cheaper than diesel...Thirdly the two people I know that have run it in their engines, (b100 I beleive) noticed a slight decrease in power, and in fuel economy. Here is a helpful link that lists pros and cons of it though
Auto Review: Pros and Cons of Biodiesel