Filed under: TransportationDespite not making any lusty noises when tearing away from a stoplight, Tesla's eco-friendly supercar the Roadster still sets our hearts aflutter. Its price, however, makes our bank accounts sad, so we're happy to report the company is still working hard to develop an affordable option dubbed "Bluestar." Tesla CTO JB Straubel recently spoke about green transportation at MIT's Emerging Technologies Conference, elaborating on earlier plans