“Even though Facebook is now the largest social network in the world,—with 132 million unique visitors in June—it is also still the fastest growing.” Growing at a rate of 153% annually, Facebook leads the pack, with Hi5 (100%), Friendster (50%) and MySpace (a meager 3%) rounding out the group. Broken out by region, the fastest adoption rates is occurring in Middle East and Africa(403%), Asia Pacific (458%) and Latin America(no joke, 1055%). Facebook must be doing something right! [More on TechCrunch]