It would be nice if there were an internal pm system to help move further away from email
Right now aC still uses email as a crutch to help communication. Right now I have to check my email and aC for any updates my clients/staff have posted. If all messages were done internally on aC, it would encourage it's use and make it more independent. (not to mention it would be nice for clients and staff to be able to easily who said what and when they said it - a very facebook style messaging system would be nice)