Co-founder and CEO, Tesla MotorRank: 19Why he matters: Eberhard's high-tech, battery-powered electric car is less about bland eco-consciousness than about sex and speed. The Tesla Roadster does zero-to-60 in a whiplash-inducing four seconds, reaches over 130 mph, and goes more than 200 miles on a single charge.
And oh, yes, it's also helping to save the earth. No surprise that the likes of Larry Page and Arnold Schwarzenegger have lined up to buy the six-figure supercar. Next up, Eberhard will take aim at the mass market by introducing a four-door sedan, the WhiteStar, that's slated to debut in 2009 at half the price.
Meet 50 Who Matter winner Gina Bianchini. Her site, Ning, lets anyone be a social networking mogul. (more) 
