Excerpt: "Bio-butanol developer Gevo emerged from stealth mode to announce a financing by new investor Virgin Fuels and existing investor Khosla Ventures. Jonathan Shieber at VWire reported today that the round was a $10mm Series B. The financing is intended to help the company 'whip it good' into a pilot plant stage. If toxicity and cost issues can be addressed, biobutanol has a lot of potential as a gasoline replacement with better energy density, transportability and other benefits versus ethanol."