
TechCrunch posted an excellent overview of the top social media sites based on monthly visitors.
The latest data for November 2008 is (source: ComScore):
1. Blogger (222 million)
2. Facebook (200 million)
3. MySpace (126 million)
4. WordPress (114 million)
5. Windows Live Spaces (87 million)
6. Yahoo Geocities (69 million)
7. Flickr (64 million)
8. hi5 (58 million)
9. Orkut (46 million)
10. Six Apart (46 million)
11. Baidu Space (40 million)
12. Friendster (31 million)
13. 56.com (29 million)
14. Webs.com (24 million)
15. Bebo (24 million)
16. Scribd (23 million)
17. Lycos Tripod (23 million)
18. Tagged (22 million)
19. imeem (22 million)
20. Netlog (21 million)
Peter. Flemish, European, aid worker, blogger, expeditioner, sailor, traveller, husband, father, friend, nutcase. Not necessarily in that order. (