Sharing documents online has been a difficult task and you either need to upload it online or sent as an attachment. Microsoft has announced a new service called Docs.com which allows you to create or upload documents, spreadsheets and presentations online and then share it with your Facebook friends. You can login with your Facebook ID and then share the docs. The shared docs are available to all your friends or you can selectively share them.
Built on Microsoft Office 2010, the Docs app enables Facebook users for the first time to create and share Microsoft Office documents directly with their Facebook friends, using the Office tools they already know.
Docs.com is currently invite only, although you can check out the features. You cannot create a document unless you have the invite codes. You can sign in using the Facebook ID and request for access.
Try out Docs.com