Journalists covering the Sochi Olympics have taken to Twitter to air complaints over the state of their hotel rooms. For the past week, some reporters have been tweeting images describing what they say are appalling conditions in the media hotels.

Ex-presidents Felipe Calderon of Mexico, Alan Garcia of Peru and Cesar Gaviria of Colombia brought to Bogota the fad for selfies that has overtaken Hollywood and US President Barack Obama. In charge of posting the dignitaries' picture on the social network Twitter was Calderon, and judging by the look of concentration on his face, he seems to have been the photographer as well.

The rise of Web 2.0 tools created a new, easy-to-use channel for diplomats and public diplomacy bureaus to reach far-flung publics. Many foreign ministries adopted the new technology almost immediately, creating a field called public diplomacy 2.0. New problems appeared quickly though.

Turkey's president on Friday ruled out any ban on Facebook and YouTube after Prime Minister Tayyip Erdogan said the sites could be shut to stop his foes anonymously posting audio recordings purportedly exposing corruption in his inner circle.

Social media can be a powerful tool, especially when considering how it empowers regular people with the ability to reach a large audience. It certainly played a prominent role in the Arab Spring protests of 2010, when protestors took to Twitter and Facebook to document the uncensored reality of their experience.

It has had its fair share of social media scandals and been accused of buying fake Facebook likes, but the White House believes the benefits of being an active participant in the uncertain world of social media still far outweigh the risks. It calls it digital diplomacy.

At a recent series of events in Beijing hosted by the Berggruen Institute, I was asked to speak about social media and the potential harm and good associated with it. My view is pretty straightforward -- I believe that social media is a tool of liberation and empowerment. That may seem fairly audacious when a good portion of the Western world is using Facebook and Twitter to post pictures of what they had for dinner or take quizzes on what TV character they may be. 

Chinese internet company Sina plans to spin off its Twitter-like microblog service, Weibo, in a US initial public offering to raise US$500 million, a person with knowledge of the deal said on Tuesday. The person, who wasn’t authorised to speak publicly about the deal, said investment banks Goldman Sachs and Credit Suisse had been hired to manage the IPO in New York.