Yeah well i am pretty sure that Blizz is not worrying about patching new dupe methods so if someone did find one it would be huge.
Given that I still hear complaints about this and that "poofing" I suspect that any current dupe methods (if they exist still) are using old techniques that have already been recognized by the current patch....
I really would bet that any of the stuff that doesn't dissapear has been baal botted....I find stuff myself and I dont even bother botting so Im sure someone letting their bot run for a week would find even more.