LinkedIn Keeps Growing

LinkedIn, the social network dedicated to corporate networking and employment, now has 131 million members and over a million groups.

On October 31, LinkedIn CEO Jeff Weiner reported that 15 million users joined the service during the third quarter of 2011, a 63% increase over the same period last year. Revenue jumped to $139.5 million, a 126% increase in 12 months.

LinkedIn’s brand is rapidly spreading across the web. Their ‘share’ button is now on 180,000 domains, 40,000 more than the second quarter. There was also a marked increase in web developers using LinkedIn APIs.

A recent Forester poll confirms LinkedIn’s good news: it ranks them as the second most popular social network, behind Facebook and ahead of Twitter.