Just decide to signup for Ning, and explore it a bit, it seems like quite similar to FB I gues, but have not really gave it a go. Debra is doing her mini- conference event via Ning to have asynchronous discussion before the meeting.
In Ning you are able to create your own social network and start a discussion on that. Have your blogs and events similar to other platforms. You can join the Forum that debra has created for her assignment two for the mini conference and add you comments on that.
Looking forward in exploring NING.