comScore, Inc. a leader in measuring the digital world, released a study of worldwide usage of social networking sites, indicating that while the growth in new users in North America is beginning to level off, it is burgeoning in other regions around the world. During the past year, the total North American audience of social networkers has grown 9 percent compared to a much larger 25 percent growth for the world at large. The Middle East-Africa region (up 66 percent), Europe (up 35 percent), and Latin America (up 33 percent) have each grown at well-above average rates.