PROpenMic, the Ning social network set up by Robert French, will soon have 500 members (including a good number who know each other from Euprera and EuroBlog). The platform is powerful - a more serious version of Facebook - and I am hoping it will be of real value to my students.
It is early days and most people are still experimenting but it will be fascinating to see how it develops. Robert is working hard to bring in new members and again it will be interesting to see how many people can join without diluting its impact.
Like everything else, it will be about content and value - the more that people get out of it, the more they will put in.