Due out soon, the Tesla Model S would allow a Facebook billionaire to "shop local" while also keeping it green. Tesla headquarters is just a short drive away and the Model S runs purely on electricity. And, with prices starting at under $60,000, it will be only moderately pricey.
Also, it's got a huge touch-screen inside with full Web access. That way, Facebookers can keep up on all their friends' updates even while driving, should they choose to. We hope they'll pull over first, though.
Google's self-driving car responds reasonably well in real-life traffic situations around Washington, D.C.