I am applying a CSS transform (and the browser specific -webkit, -o etc):
transform: matrix(0.5 , 0 , 0, 0.5, 0 , 0);
to a div then using jQuery\'s draggable
My own "answer" was on this occasion was to adapt jQuery UI draggable to make a separate interaction, called "traggable".
https://github.com/paullth/JS-libs
http://jsfiddle.net/paul_herve/ws27C/4/
Would still like to hear about any alternatives...