I'm sorry for digging this thread out, but I started using Cloud a couple of weeks ago and think Dropzone would fit perfectly with it. That said, I also think other "cloud" providers are a good fit, like Droplr or the other one that I can't remember right now. Unfortunately I don't have time to tinker with the API by myself, so I would like to request that somebody else with more time on hand, can do this.
Andreas