After Facebook and Twitter, SecondMarket Buyers Lust for Pinterest, ZocDoc and Klout

SecondMarket, the private market dominated by sales of stock by former employees at consumer Web and social media companies, had more than $558 million in transactions in 2011, for 55 percent year-over-year growth, it said today. Buyers tell SecondMarket they are still most interested in getting shares from regular targets like Facebook and Twitter, but some recent emerging targets include Pinterest, Practice Fusion, ZocDoc, Klout and Kickstarter. (Of course, just because there are would-be buyers doesn’t mean there are sellers.)