It's not working in chrome 35.0.1916.153.
I tried to drag different things (links, text, pictures) and I always get exceptions in the console and nothing happens except that the drop field shows a check mark.
Error: http://pastebin.com/Cm7z3YtJ
If you open Content Settings -> Manage Exceptions and add the Piconka extension id (which is cnjhpammhediiacllmhbobnmpnfbnfha) instead of a host pattern, it should work.