Looks like the group has had most of its discussions on LinkedIn.
I'm not sure about "inviting" people to join though -- things might get very confusing for those people who have just started getting to grips with systems thinking in T214.
However, I did come across one individual who has taken our courses:
I was introduced to the concept of Systems Thinking in 2004 during my undergraduate study at the Open University. Since then, the world has never been the same. I started synthesizing phenomena rather than analyzing them. I started looking at the interactions among the parts of a system rather than understanding the function of each part. I started looking beyond visible symptoms and apparent boundaries of a given system. To me, systems thinking is about understanding the world.
http://www.systemswiki.org/index.php?ti ... AhmadSalih