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 [...] Read more »