Once you get past Tagged.com’s and Facebook.com’s amazing growth figures this past year (774% and 270%, respectively, with Bebo in third place at a respectable 172%), the worldwide membership of these sites is a little less jawdropping. But that international appeal probably explains a lot of these sites’ growth. Friendster hasn’t grown as much, but 88.7% of its members are in the Asia/Pacific region, as opposed to 7.7% in North America. Bebo’s mostly in Europe, but Tagged’s membership is more evenly spread through all regions of the world. All three are based in Northern California. All this is according to comScore’s latest figures. PC World’s headline is “Social networking quickly taking hold globally,” and CNET ran an analysis.