Study: Content preferences vary by social network.

In China, kids on the Web have created a whole new web language like webdings called "Mars Language." It's become so prevalent that teachers have had to tell students that it's not acceptable shorthand on tests.
(from the panel called "Social Media and China" at SXSW)

Almost 13% of viewers tuning in to the Olympic opening ceremonies were also surfing the web, according to Nielsen. The website of choice was Facebook, with an estimated 41% of simultaneous users spending time on the site. Nielsen also found that 14% of Super Bowl viewers spent time online during the game, at an average of 29 minutes per user. Simultaneous use of TV and PC, particularly on social sites, demonstrates the need for multiplatform thinking and strategies for brands. Multiplatform behavior coupled with the growing amount of time spent on social networking sites signals that social media cannot remain at the bottom of the marketing food chain. We cannot simply “extend” the big idea into social media as we once did with digital. It has to be considered much further up stream in the planning process to insure its rightful place in the marketing mix. Pepsi has done an amazing job of this with the Pepsi Refresh Project. Social media is inextricably linked and central to the core idea.