This is a student's reflection on the use of social media in a patent engineering course. He had positive feedback and even offered a suggestion to make it easier to find other students' work. He gave examples of what the students did in the course.
This blog talks about Wenger's Community of Practice evident in MOOCs but goes on to say that there are multiple COPs formed in MOOCs. The post also contains a great image of social networking tools as a city.