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Well, the social blogging platform I was part of (Xanga) in 2001-2007-ish (before Facebook) peaked at about 32 million bloggers... so it's definitely not unthinkable. There are a lot of people-- especially in the 35+ age group-- who are sick and tired of Facebook's fluffy superficiality. Sure, FB is a great way to share photos with family and friends overseas... but if you want any kind of depth content? Good luck with that....