Some Experiments with Canvas Drag and Drop

I've been toying around with canvas tag and learning the ins and outs of Drag and Drop I created a little proof of concept app that allows you to add markers to an image.  The meta about the markers (relative location, marker symbol, desc, color, etc) are stored in a DB on another server using JSONP requests. See the demo here (FF3+ recommended) The code repo is currently on google code
Tagged html5 javascript