I looked into Second Life a few years ago. According to this TED video, it continues to grow. I have looked at several YouTube videos as well. People can actually create things in Second Life and then sell them for real money. I saw one YouTube video that they are helping people to cure social anxiety with Second Life. I think there are a lot of possibilities and evidently the possibilities are growing by the day. They evidently are teaching classes there as well. Happiness 101 comes to Second Life? I suppose anything is possible – in Second Life.
http://www.ted.com/talks/lang/en/the_inspiration_of_second_life.html