This is a screenshot from some nice research by Nielsen, called Global Online Media Landscape. Although it was already posted in April, it shows that the different social networks have overtaken email in terms of usage for communication in February this year; member communities and social networks are now an equally preferred method of conversation.

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Gerd Leonhard works as a Futurist in the Media, Technology and Communication Industries. At his blog Media Futurist, he presents a collection of slides about Selling 2.0, “that I have just cooked up for an upcoming presentation.”: