Didn't work on Firefox 14.0.1 Ubuntu 12.04. Dragged elements don't appear on the canvas. The error in the console log, "not dropping, no container or component found". Same issue with Chrome Version 21.0.1180.81.

Looking forwards to when these are fixed though, I'd like to use it myself, and would be happy to contribute.

== Update ==

The problem I was having seemed to be I hadn't named my screen, I was then shown a blank white screen which looked like I could drag the elements onto, but this didn't work.