Has anyone been part of an online learning community?

I have been thinking about ways of extending the availability of our training and one idea I came up with was the formation of a TA or psychotherapy learning community. This would be a membership group that comes together online to share ideas and resources. 

We could invite guest speakers to run webinars on a load of different subjects and keep the talks and handouts available to members for download. Over time this would become a rich resource for therapists and students.

I’m sure something like this could easily be run from the website. Let me know what you think. If enough people are interested I can look into the technology to support it.