Nielsen//NetRatings published the list of top social networking sites in September 2007.
| Top social networking sites in September 2007 | |||
| Audience, 000 | Growth | ||
| Site | September 2006 | September 2007 | YTY |
| Myspace.com | 47,189 | 58,581 | 24% |
| 7,765 | 18,090 | 133% | |
| Classmates Online | 13,291 | 13,313 | 0% |
| Windows Live Spaces | 7,782 | 10,275 | 32% |
| AOL Hometown | 9,997 | 7,685 | -23% |
| Reunion.com | 4,712 | 4,845 | 3% |
| 1,762 | 4,075 | 131% | |
| AOL People Connection | 6,096 | 4,017 | -34% |
| Club Penguin | 1,333 | 3,769 | 183% |
| Buzznet.com | 1,061 | 3,737 | 252% |
| Source: Nielsen//NetRatings | |||