OS X Lion - When moving multiple files in Mac OS X Lion, an iOS-like bubble shows the number of files being dragged.
/via Hugo Ahlberg
Google+ - When you drag more than one person onto a circle, it bundles your selected contacts while dragging.
/via postinspiration
Reederapp - By tapping and holding on an item, dragging left stars/unstars the item and dragging right marks it as read/unread.
