Fans of Shelfari, a social networking site for booklovers, may be interested in the recent announcement that it is being acquired by Amazon.com. While terms of the deal were not revealed, the announcement on the company's blog did state that the team looks forward to growing its community and creating new tools. Amazon.com helped fund Shelfari and already owns a portion of the site, which allows members to stock virtual bookshelves and make friends with fellow bookworms. Interested in joining a social networking site that revolves around books? Check out Shelfari, LibraryThing, and GoodReads, as well as others we listed in Bookish Social Networking. And stay tuned for an upcoming round-up of sites, complete with features and highlights!