Facebook passes 15 million mobile user mark

Social networking giant Facebook announced its mobile userbase has expanded from 5 million to 15 million since the beginning of 2008. Writing on The Facebook Blog, Facebook mobile team engineer Wayne Chang adds that in the 24 hours after the site began allowing subscribers to comment on their friends' status updates to the Facebook mobile site, users posted close to a million status comments. Chang adds that Facebook is in the process of expanding its mobile staff, and promises new improvements are forthcoming.

For more on Facebook's mobile efforts:
- read this Facebook Blog entry

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