Chart Classes and Drag and Drop Capability

I was wondering if we could do a drag and drop capability on orgchart class.

 I understand (after reading the PeopleBooks) that OrgChart can easily be created with Simple Peoplecode and can also contain field change events attached to it - Which is really cool and also the feature of drag and drop capability that is available on TreeManager or Rating Chart.

The purpose of this feature would be when you are have heirarchial structure (like an organization chart) and by using a drag drop capability, we could move 1 person from under Manager A to now report to Manager B - So when a drag / drop occurs, the field change event can kick in and the peoplecode could be used to perform any validation and further action.