What's the point? Here's my logic:
-To use iPad Office, you need to be 365 subscriber.
-If you're 365 subscriber, MS gives you 1TB on OneDrive.
-If you have 1TB on OneDrive, why the hell would you even need to pay extra cash for dropbox?
Plus, OneDrive is damn good. Not that dropbox is bad, but hey.. MS gives you the whole package: email, cloud and office. It's also cheaper if you consider the bang-per-dollar. Makes Apple Drive and its ridiculous prices looks lame. Cloud services should be cheaper. It's only a damn cloud.