Shelfari, the virtual bookshelf community, is holding a Harry Potter contest: The Seven Days of Harry Potter Seven.
The grand prize is a J.K. Rowling signed, first first-edition copy of "Harry Potter and the Sorcerer's Stone", the book that started it all. In order to participate, simply add the latest Harry Potter book, "Harry Potter and the Deathly Hallows," to your Shelfari bookshelf within seven days of its release, and write a review. Shelfari is taking advantage of the popularity of this book to emphasize the social utility of its site. Groups can be formed around particular books, genres or motifs, and individuals can discover and share information, reviews and opinions about books, encouraging others to read and share themselves.
In other Shelfari news, the company has recently launched its Facebook application, letting users share their bookshelves on their Facebook profiles.