Mashable.com notes a report by eMarketer that predicts advertising spends on social networks have been consistently beating estimates and are on track to reach $2 billion by 2010.
“U.S. marketers are expected to spend $350 million in 2006, an increase of 25% over previous estimates. Estimates for 2010 are also up 16 percent to $2.2 billion, with social network ad spending projected to account for 8.5% of the U.S. ad market by 2010.”