Those of you book lovers out there now have your very own social media site. Shelfari users can share their ratings on books they have read or are reading and see what their friends are up to.

Shelfari is free and allows users to build a “shelf” and embed it in websites, blogs, or Myspace/Facebook pages. Users can also join groups devoted to a favorite author, genre, or book such as Harry Potter, Borat’s Travel Guide, or If I Did It.

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