Mahara provides support for online communities offering various communication and social features.
There is a online group MAPPED in Mahara system created for this course. Find it and join it. Once you belong to a group you can send messages, give access rights to data, views and collections and make comments within group's participants.
Browse through the e-portfolia of your group. Perhaps you will find inspiration for your work.
It is important for you to enroll to the group to modify the access settings in activity 3.6