CNET: A growing number of start-ups are betting against the dominant biofuel crops–corn and soy–and looking to sidestep the backlash against biofuels, which are being blamed in part for higher food prices and deforestation around the world. Melbourne, Fla.-based PetroAlgae says that it hopes to test a commercial system as early as next year. The company licensed strains of freshwater algae bred by Arizona State University and is developing the bioreactors and harvesting methods …