If corn-based biofuels are the Britney Spears of the cleantech world (a fallen star but still all over the place), fuel made from algae is the next great “American Idol” winner (major potential in the pipeline). And despite the fact that algae-to-biofuel start-ups have been taking their sweet time bringing a pond-scum fuel product to market, some inroads have been made recently–GreenFuel is building its first plant, PetroSun starts producing at their farm on April 1, and big-oil Chevron and Shell have made some early bets as well.

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