there is no such functionality out-of-the-box
Oh, then i was under the wrong impression that the dragSupport would provide this feature....
I guess so.
dragSupport adds the ability to be a source for drag-drop operation. The drop zone (component with dropSupport) is required to make sense for such operation. It is a matter of application what is going to be next after the drag-drop operation occurs. So, It is up to you if you want to change the coordinates of the source object.