We found 29 social networks that currently have one million or more unique visitors per day. For traffic data, we used Google Trends for Websites. A few quick observations: * Facebook has stated that about half of its users log in to the site every day, which seems to match these numbers. * It’s interesting that Orkut, counted out by many, clocks in a significant number of daily visitors. From this perspective, it’s the second-largest social network in the world. This is in large part due to it’s extremely strong following in Brazil and to a somewhat lesser extent, India. * How the mighty have fallen. MySpace is only number 12 on this list. (And speaking of the fallen, Friendster didn’t even make the list.) * Facebook dominates to an almost ridiculous extent. Combine all the daily visitors for the other 28 social networks on this list and you still only end up with two-thirds of what Facebook has. - Ho John Lee