Coming to South West Florida for better or worse:

http://www.naplesnews.com/news/2008/apr/05/new-biodiesel-crop-jatropha-t...

In LaBelle, a company called My Dream Fuel LLC is cultivating Jatropha curcas, a tree-shrub that shows promise as a new biodiesel crop in the U.S. that could one day power engines and generators.

Nearly 1 million seedlings are in the ground at a nursery in Hendry County and promoters are looking for farmers – here and across the country – to raise them as oil-producing plants.

Pete

Growing these Jatropha trees in Florida may be a good location since the state is known for soils having a lot of phosphorus. Much phosphate is mined there and shipped to other parts of the country. So, maybe the inputs would be minimal, only energy required is on harvesting the seed pods and crushing them.

Still I would not want to see too much of this grown in Florida as it might crowd out food crops for the local population.