Zero Motorcycles was a surprise hit in 2008, selling out its stock of 'X' battery-electric motocross bikes much faster than expected and proving in the process that customers are well and truly ready to slap down the dollars for a quality electric off-roader. Now the company has announced the Zero S - a street-legal electric supermotard capable of 60mph and with a 60-mile range off a full 4-hour battery charge. At under USD$10,000 - before you get your 10% Federal plug-in vehicle credit - the Zero S joins the Vectrix electric maxi-scooter in the list of truly practical electric bikes capable of freeway speeds. And with a power-to-weight ratio almost identical to Suzuki's DR-Z400SM, it should be a bag of laughs to ride. If consumers liked the X, we reckon they'll go crazy to be the first on the block to ride this street-legal, lean, green giggle machine.