I'm creating a toolbar with a list of my usual folders and drives, and i'm -slowly- succeding. what i'm trying to do right now is to find the dropbox icon, the one that update depending of your dropbox 'status' (in sync, complete, etc)
Dropbox shows the status for each item it's processing. That is, only for separate files or folders in your Dropbox folder. I wouldn't know of a way to reflect the general status in an Opus button in a tool bar.