According to Wikipedia: "Beginning in February 2010, John started a new venture in the field of bacterial quorum sensing. His new company QuorumEx is headquartered in Belize and is working towards producing commercial all natural antibiotics based on anti-quorum sensing technology."
I just love how the man, even at 66, still swings for the fences. He doesn't dick around with small projects and SaaS. He seems to have a track record of going after game changing technologies.