That is what Jolicloud is aiming to do; organize all our clouds. You can login via Facebook or create an account using an email address. You can then use the service via Google Play and get an App from the App Store. Learn about their Desktop which makes organizing your cloud easier. They also have an OS that can be utilized as well.
With Jolicloud you can connect the apps and services you already use and have it all in one library. You can organize all your stuff in the library or create custom collections. A search feature allows you to easily find older documents and memories. IF you choose to connect via Facebook you would be able to browse the public content within their library.
As with any site where you are providing "access" to your "stuff" read all the fine print. See the short video below for more information.