Your comments

I second this request. Again, I mention CodeAnywhere as a reference app with this regard as well :-)
I think it would be really great if you implemented automatic Dropbox sync - in the manner it is done in CodeAnywhere app. It feels so natural just to edit the file, and once "save" is hit to upload all changes.
I know there might be problems with conflicts resolution, however the benefits outweigh the drawbacks IMHO.