ZipCar not only beat the street today, they are down right speeding past it. This ten year old Cambridge Mass based car sharing company had its initial public offering Thursday morning (today) raising over $170 million, and nearly doubling its $18 pre-IPO share price set on Wednesday. The stock (ZIP – best ticker ever, right?) opened at $30 and now sits at a clean $28 with almost 10 million shares being sold.

Not bad for a company that had a net loss of $14 million on $186 million in revenues last year. But, who’s counting?

ZipCar investors are certainly banking on strong revenue growth moving forward, a lean business model and greener trends where urban dwellers like myself rely on renting cars instead of purchasing them.

ZipCar operates a fleet of more than 8,000 vehicles in 14 cities and more than 230 colleges in the U.S., the U.K., and Canada. According to CrunchBase, they have raised just over $60 million from Benchmark Capital, Greylock Partners, Globespan Capital Partners, Meritech Capital and Pinnacle Ventures.