You can now add books to a "Wish List" to save them for later (or so your family and friends can purchase them for you). To get started, log in to your account, search for a book, and click "Add to Wish List." You can even email your list to people (from the "Wish List" tab under "My Account"), for a not-so-subtle hint.
Finding someone's Wish List is easy, too. Just search for their username or email address in the box to the right. Happy browsing!