When someone chatting in the system, every members in the project can receive email and they can reply directly without open or login to the system just by replying directly from the email and the message or chat can be sent through email. So email and chat can be simultenously. The same run for the update status.
This is important because not every clients want to download the apps.
Also whitelabelling the email subject by projects name and even email smtp will be awesome.