WackWall, a free service for creating your own social networks, has changed its name to Wall.fm. Wall.fm offers all of the same great features that it offered when it was called WackWall. I reviewed WackWall in August and you can read that post here.
Applications for Education
If you were a Ning user who was left without a network when they switched fee structures, Wall.fm is an alternative you might want to explore. Wall.fm could be useful for created an online environment in which you, your students, and their parent can share information related to your courses.