Looking for the current highest traffic social networks? Check out this infographic with 29 very active social networks that have at least one million visitors per day. Of course Facebook dominates the list. Interestingly, if you combine all the daily visitors for the other 28 social networks on this list you end up with two-thirds of what Facebook has.
If you are interested in the visitor trends of each social network, read it on the blog of Pingdom.com.