The greatest rise is of Facebook. Its unique visitors count has increased by 116 percent. It is near the 200 million figure and will cross pass it soon.
Top Social Media Sites (ranked by unique worldwide visitors November, 2008; 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)