Chinese social network Renren files for IPO

Renren, China's most popular social network, filed for an initial public offering in the United States on Friday hoping to raise as much as $583 million.

Zuckerberg at Ore. Facebook data center

(AP) -- Facebook CEO Mark Zuckerberg made a surprise appearance Friday night in Prineville, Ore., at a community party for the grand opening of his company's new data center.