Remember when everyone though Facebook groups was going to be the next big thing...wasn't that like 8 weeks ago, when was the last time you got a facebook group invite? and how many do you belong to that are active?
I'm still amazed how things "catch fire" or just dont. I'm trying to distill what it is some times that make it happen and to be honest i'm not sure after all the research I'm not sure i'm any closer.
Why aren’t you using groups? What function is lacking? If a http://www.tokbox.com/ like live video conferencing application was implemented do you think this would help?