What Happened to BioWillie?

Willie Nelson burst onto the environmental stage in 2005 with a grand unveiling of his own personal brand of biodiesel, BioWillie. His old, familiar face was in newspapers across the U.S., broadly smiling as Nelson lifted the nozzle of another new biodiesel pump in yet another gas station somewhere along a Midwestern highway. People suddenly remembered Willie Nelson... But something has happened to BioWillie.