Goodreads.com: Share Book Recommendations With Your Friends, Join Book Clubs, Answer Trivia
See what your friends are reading. Keep track of what you've read and organize your books into virtual bookshelves. Join a book club to discuss your favorite books. A better way to find good books to read!
Mahalo.com: Mahalo.com: Questions, Answers, How Tos and Coupons
Mahalo, the knowledge sharing service; helping people quickly find the best information on topics, how to’s and coupons. Members of the public can also earn money by contributing to Mahalo topic pages or by answering questions on the Mahalo Answers Q&A system.