I'm really still looking for a feature that allows you to upload to a shared folder without being part of that share. If I'm at work, I just want to upload to my common shared folder at home without having to be a part of that share, namely, I don't want local copies of those files at all nor a trace that they exist. This feature should also allow your friends to upload to a common shared folder without having to be a part of the share i.e., they just want to give you something. Instead of the "tell me when you got it, so I can remove it from the share" interaction.