In Google Books, you can now create bookshelves similar to personal online libraries such as Shelfari, GoodReads and LibraryThing.
"You can create a personalized library on Google Books which allows you to organize, review, rate, and search a customized selection of books. These collections live online, and are accessible anywhere you can log in to your Google account. Bookshelves that are set to 'public' (with the icon showing two people) are publicly visible to friends who know the URL of your collection, so once you've built a collection, you can share it with them by sending them a link to your library in Google Books."
What's the next step for GoogleBooks? How about creating code to embed these bookshelves on our blogs and websites?