Twitter announced today — over Twitter — that it's going public. The news wasn't much of a surprise, but the way in which the company filed papers with the SEC is a bit of a mystery.

British Airways lost his luggage; he took to Twitter to vent about it. And then targeted tweets to British Airways' thousands of followers.

A Canadian nurse uses Twitter to find people who may be suicidal and help them.

By hiring Nathan Hubbard, Twitter seeks to make revenue.

Twitter is tapping former Ticketmaster CEO Nathan Hubbard as its first Head of Commerce. The social network wants to generate more revenue from online retail, but the details have yet to be worked out.

Airbnb is the latest company to experiment with Vine.

Social networking site LinkedIn lowered its sign up age to 14 and will start trying to work with college students and high-schoolers.

Nielsen says Twitter is inspiring people to tune in and participate.

From using common sense to minding your p's and q's, eight tips for how to survive in the social media space as well as the workplace.

A New York food truck worker who tweeted about a big company not leaving a tip on a big order lost his job over the tweet.