In all the coverage of Zipcar's recent announcement that it's planning to go public, one important point has been mostly ignored:  This is not just any old IPO. This is an IPO of a not-only-for-profit--and that's unusual. Of course, whether it's ultimately a positive--or wise--step for any mission-driven company isn't clear, [...]

Car-sharing concern Zipcar Inc. filed plans for an initial public offering of stock, a deal that could be a draw for investors looking for a business with a dash of eco-consumerism.

Just 4 simple steps to Zipcar freedom: join, reserve, unlock and drive. Apply in minutes and you could be driving in no time.

http://www.ted.com Robin Chase founded Zipcar, the worlds biggest car-sharing business. That was one of her smaller ideas. Here she travels much farther, co...

A community of folks who’ve found out that car sharing beats the heck outta car rental or ownership. We’re tweeting from Zipcar HQ Mon-Fri 9am-5pm EST.

BY Nicole Hamilton, Alexis Kushner, Alecia Muth, Suzanne Yonkers, Gary Zin