Pinterest allows users to collect images around a theme by uploading their own pictures or by “pinning” images that they find on the web. What results is a single website with all your pictures collected together for others to view; you can even add text annotations if you like. Just install the Pinterest bookmarklet and you can “pin” any interesting image that you come across. You can also “repin” interesting images and leave comments on the boards of other Pinterest users.
Check it out here: http://www.pinterest.com/