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Micro-blogging site Twitter is joining the ranks of Facebook and Google+ as it launches 'brand' pages as part of a service-wide redesign.

A federal judge ruled that Twitter must give information to the Justice Department about three of its account holders who are under investigation for their links to WikiLeaks.

In an anonymous industrial park, CIA analysts who jokingly call themselves the "ninja librarians" are mining the mass of information people publish about themselves overseas, tracking everything from common public opinion to revolutions.

Rapper Snoop Dogg gave props on Twitter to an ad for the Toyota Sienna minivan. Actress Tori Spelling linked to a website for rental cars. And reality TV star Khloe Kardashian soliloquized about the brand of jeans that accentuates the famous Kardashian derriere.

After the Obama campaign’s masterful use of social media in 2008, House Republicans have adopted Twitter as their karaoke microphone against the White House bullhorn.

Families of disabled people have been outraged by his repeated use of the word, which they say is a derogatory term for somebody with Down's Syndrome.

Twitter CEO Dick Costolo says his company is now seeing almost 250 million tweets every day, up from 100 million at the beginning of 2011. That’s a billion tweets every four or five days. Costolo made the comments in an on-stage interview with John Battelle at the Web 2.0 Summit in San Francisco on Monday night.

After learning that IndyCar driver Dan Wheldon had passed away due to injuries suffered in a horrific 15-car wreck that occurred during the 11th lap of the season-ending race at Las Vegas Motor Speedway, the other drivers opted to drive a five-lap salute to their fallen colleague.