Istock_smartphone_cellphone_handsPinterest has become a hot social pinboard that drives more traffic than most major social networks — meaning there is more content on the site than ever. That’s why many users are sure to appreciate Pinterest’s new weekly email newsletter, making it easier to find even more great pins and helping them keep tabs on how their own pins are doing.

Facebook-world-600The feature — discovered by Stuff, a New Zealand blog (which is unaffiliated with the U.K. publication of the same name) — is being tested with a “small percentage of users” right now, a Facebook rep says. The fee for using Highlighted Posts, meanwhile, runs from zero to “a couple of bucks.”

Draw-something-600“We believe it’s not only the fastest growing original mobile game of all time – 50 days to hit 50 million downloads – but one of the fastest growing web sensations that we’ve seen,” Zynga said in a statement.

Vader-draw-something-600The game, which asks you to sketch objects and pop culture references on your smartphone or tablet for your friends to guess, has become a dominating force on the social graph. In a short time, it has earned the number-one best seller slot in many countries, in both the iOS App Store and Android Market. It has sold 37 million times worldwide, as of this writing, and doesn’t show signs of petering out.

Twitter-keyboard-6001A URL on the message sends “recipients” to where they are asked to answer a few questions in exchange for the award. The spam campaign was uncovered Thursday by Sophos, who noted on its blog “Your chances of ever receiving a prize are remote — chances are that you will either end up handing over personal information, or will be helping the original scammer earn commission.”

Social-media-monopoly-image-mashableGoogle‘s insatiable appetite for other companies was just one of the business narratives of 2011, though. The other was the handful of social media IPOs that were eager to align themselves with the loony Dot-com era, a baseless comparison if there ever was one.

Whatever the case, for a lot of folks in the social media/tech industry, 2011 was a good year to cash out. Here’s a look at the two primary methods: going public or getting acquired (often by Google).