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Twitter has fewer users and less revenue than Facebook, but in mobile advertising Twitter appears to have dodged the problems that dragged down Facebook's stock after its public offering last year.

Twitter has filed for its long-awaited initial public offering, revealing a fast-growing company but one that lost money in each of the past three years.

More hotels, shops and other businesses will soon be offering free Wi-Fi to customers if they agree in return to "check-in" at the business from their Facebook account.

The flood of stories on government spying will not be slowing soon -- in fact the majority of the most important documents detailing how the U.S. National Security Agency collects personal data have not been published yet, journalists from U.K. newspaper The Guardian said on Tuesday.

Facebook wants to make its ads less annoying to users by only showing them what they want to see, even if it means a dip in ad exposure for some marketers.

The first draft of anything is terrible, Ernest Hemingway once said (though in slightly more colorful language). Facebook is applying some similar thinking and allowing users to edit their posts.

Sudan has regained access to the Internet after a nearly 24-hour blackout that may have been a government-directed response to violent rioting in the country over lifted fuel subsidies.

Connectivity to one of three major international ISPs in Sudan has been restored, following reports that the government may be responsible for cutting off the country's access amid riots over the lifting of fuel subsidies.

Didn't catch that tweet all your friends were talking about? Twitter wants you to see it next time, using a new feature that will notify you of tweets and contacts that Twitter thinks you'll want to know about.

Facebook is moving ahead with plans to test a new mobile feature to entice more people to buy products while shopping on smaller devices such as iPhones.

The days of shrugging off Twitter may soon be over. Some 200 million users strong, the site is already one of the most prominent social networks, but going public could give it the muscle to become the next Facebook or Apple, one analyst said.

Twitter announced -- on Twitter, of course -- that the company has filed with the U.S. Securities and Exchange Commission for an initial public offering.