This is actually a sideload/Android app and not an official app for the Playbook. Nonetheless, it got updated, so Blackberry Playbook users should check out the following link to see the workarounds. There is no chaneglog.
• Always have your stuff with you, no matter where you are.
• Save photos and videos to your Dropbox.
• Share your photos and docs with family and friends.
• Save email attachments straight to your Dropbox.
• Easily edit docs in your Dropbox.