Jatropha Oil, more practical version of biodiesel

A friend, Nielson, turned me onto a plant called Jatropha. According to Wikipedia the plant yields more than four times as much fuel per hectare as soybean, and more than ten times that of maize (corn). A hectare of jatropha produces 1,892 litres of fuel. It seems that several companies have been involved with its research, but none feel that it is ready to go to market. However, some countries have already put the substance to good use. According to Chemical Engineering World Brazil has already begun using Jatropha as a biodiesel. Some articles I read say that it works best as a fossil diesel additive others declare it should be a stand alone fuel. Regardless, it is something to keep an eye on.