The December 2009 data from comScore (SCOR) were released Tuesday, and the results for the social media sector are nothing short of staggering. Fifty-four percent (112 million) of the 205 million-strong U.S. internet-user population are on Facebook, with 27% (57 million) still using News Corp.'s (NWS) MySpace. But according to data from both comScore and Experian Hitwise (EXPN), the most active users were on Tagged, MyYearbook and Orkut. And Facebook users were more active than those on MySpace.There's no doubt that plenty is happening in the social media space, but there are some facts that just might surprise you, either because of the speed of change or the discovery of players that may not have occurred to you.
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