Classroom 2.0 is a net work group for educators over the world focusing on social media and participating technologies in the classroom. I think it is very useful as teaching should keep up with the technologies. Since there is a lot more we can do in the classroom, we should know the new possibilities and make full use of them.
As you can see in the picture above, there are several sections: forum, members, groups, recordings and so on.
The forum is a very good platform for the members to connect and interact. There is a introduction thread where newly joined members post a brief introduction of themselves. The groups, on the other hand, make it easier or us to focus on our interest and needs. I, for example, joined the ESL and technology.