http://mashable.com/2012/06/11/international-social-networksItalian-based social media strategist Vincenzo Cosenza has looked at the most popular social networks used worldwide, according to traffic monitoring sites such as Alexa and Google Trends, and put together a map to highlight the leading platforms. He posted his findings on his blog, Vincos.it
Facebook — which boasts more than 845 million active users — is the top-used social networking site in 126 out of 137 countries analyzed, including the U.S., Australia, Japan, the U.K., Canada, Brazil and India.
Take a look at the chart below for more info:
It's weird that Twitter is not #2 in most countries... And that Orkut is now #2 in Brazil now. Whether we like it or not, still more and more people use Twitter...