Hi Owen,
We have it down on the TODO list and will see how many customers want auto-hide features. That feature is tricky because it involves the window being aware of where the ribbon is and also being able to pull the ribbon out of the window's UI (to put it in the auto-hide popup) and then put it back in the window later (where possible parent controls our of our control may have changed, etc.). That aspect of it makes things rather difficult.