Imagine having all of your favorite books in one spot. Maybe you do, on a shelf at home, or in the library. But with Web 2.0, you can share the titles and your reviews of all of your favorite books using Shelfari at http://www.shelfari.com. Create an account (using the same email and username that you have already been using) and start populating your bookshelf with your favorite titles. Put your Shelfari shelf on your blog, and then send it to others to share your interests! You can join groups based on topics of interests, start discussions about your favorite genres or a specific author, and find new books.