As I have just seen a slidedeck (@slideshare)of Forresters’ Jeremiah there was a interesting slide on which networks are currently growing.
Data came from Nielson Online
Site Sept-07 UA (000) Sept-08 UA (000) YOY Growth
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Twitter.com 533* 2,359 343%
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Tagged.com 898 3,857 330%
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Ning 842* 2,955 251%
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LinkedIn 4,075 11,924 193%
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Last.fm 850 1,879 121%
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Facebook 18,090 39,003 116%
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MyYearbook 1,422 3,056 115%
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Bebo 1,299 2,418 86%
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Multiply 592 941 59%
- Reunion.com 4,845 7,601 57%