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Facebook Inc.'s stock took a hit Monday after an article in the financial magazine Barron's said it is "still too pricey" despite a sharp decline since its initial public offering.

An armed man with a military background took a hostage inside a downtown office building Friday and posted Facebook updates saying he had "lost everything" before his profile page was shut down.

Facebook Inc said it will start charging businesses to run Offers on its social network, turning a previously free service into a potential revenue generator at a time when Wall Street is demanding new sources of growth and profit from the company

Zynga has countered a copyright-infringement lawsuit from Electronic Arts with its own allegations that EA sought a potentially illegal agreement to avoid poaching each others' employees.

Facebook Inc CEO Mark Zuckerberg might need to talk more often. A 30-minute appearance at a technology industry conference earlier this week has translated into $6.785 billion in additional market valuation for his company.

Tech investors are sidling up to the bar again after the "Facebook hangover," only this time they are minding their P's and Q's. "In a sense, the tech IPOs are back," said Francis Gaskins, president of IPODesktop.com. Only seven tech or Internet companies have gone public since Facebook's IPO; by comparison, Gaskins said now there are 20 technology companies in the IPO pipeline. The difference is that the offerings are smaller and priced to lure institutional investors rather than emotion-driven retail investors.

Facebook Inc CEO Mark Zuckerberg soothed investors in his first major public appearance since the No. 1 social network's rocky May IPO, breathing life into its struggling shares after hinting at new growth areas from mobile to search.

Zynga Inc's chief marketing officer has resigned, becoming the latest senior executive to depart the struggling social games company behind popular Facebook Inc games such as Farmville.

President Barack Obama's speech at the Democratic National Convention on Thursday night ranked as the biggest political moment ever on the social media site Twitter.

Not long ago, online games company Zynga looked on pace to unseat much bigger, well-established rivals as it rode the popularity of "FarmVille," the clicking game of virtual cows and real money.