Despite 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 to build a $20,000 - $30,000 family car that, he hopes, could some day result in hundreds of thousands of sales per year. Given the company thus far has shipped just 27 cars, a partnership with some major automotive player will almost certainly be required, and as SUV-dependent 'Merican manufacturers continue to suffer we think any of them would be wise to play along.