Check here for the latest numbers for the major social networking sites, updated when new data is available.
| Facebook: | 750 million users | via Facebook |
| Twitter: | over 200 million users | via AllTwitter |
| Renren: | over 170 million users | via Mashable |
| Qzone: | 480 million users | via TechCrunch |
| Sina Weibo: | over 100 million users | via Mashable |
| LinkedIn: | 100 million members | via LinkedIn |
| Groupon: | 115 million subscribers | via AllThingsD |
| Foursquare: | over 10 million users | via Foursquare |
| Google+ |
25 million users | via Mashable |
Please email marissa@modernmediapartners.com if you have additional updates, or a social network that you feel should be on the list.