Does anyone here have already used it? I wonder about two things: file attachments, are they there?
and 2nd thing: multi-persons conversation: can you add a new person to an already existing conversation? how does it work with chat or phone-messaging?
File attachments are present. They have updated Haystack, the photos infrastructure, to handle general file attachments.
I don't remember hearing if you can add some one to an existing conversation. But I clearly remember that they said that it was possible to remove some one from a conversation. Therefore, I assume, that they would have also thought of adding a person.