It is interesting to use F/B as a way to share documents with your friends, although Zoho forces you to invite people to the app
I believe that there are more interesting ways in which you can leverage F/B besides making use of your contact network. Granted, this is still 1 step more than OLW currently has, but I think we need to think of good ways to help you be more productive. With everyones feedback, we might be able to get the feature right.