ComScore, a metric used to measure internet traffic, showed that In the month of November Facebook overtook Yahoo! for the first time in worldwide traffic, with the social network nabbing 648 million unique visitors, and Yahoo! pulled in 630 million….See Details.
@TatWza

Now Face Book has To keep This Spot, Which is number 3, just Behind Google and Microsoft sites taking #1, and Yahoo! Has Been In The Top 3 For a Long time, they will be back, but for now in U.S. traffic, Facebook still trails Yahoo! a bit, with 152 million visitors and 181 million