Sapphire Energy earlier this month began production of a drop-in replacement oil made from algae.

FORBES: Audi Places Its Biofuel Bets On Joule

Meanwhile, Kior last month said it received EPA approval for a drop-in replacement fuel from wood chips using a pyrolysis process adopted from the oil refining business.

FORBES: Audi Places Its Biofuel Bets On Joule

The Aircell Smartphone will be backward-compatible with all Aircell Axxess communications systems currently in production, and available as a drop-in replacement for the company's prolific Aircell Axxess flush-mount handset.

ENGADGET: Aircell announces world's first 'airborne smartphone'

In the short-term, GTL could become a "drop-in" replacement for oil-derived kerosene in aero engines and airports without requiring any modifications to equipment, says Airbus.

CNN: Flight of biofuel fancy?

There was a dramatic finish in which replacement fly-half James Arlidge and full-back Tovey each had drop-goal attempts charged down while the latter's final attempt drifted wide for Tom James to mark and kick off the field.

BBC: Dragons 19-21 Cardiff Blues