I recently did some online training through work and at the end, anyone who wanted to could leave their email address so they could contact others for help/support/advice. I now have a long list of email addresses, but starting an email conversation with forty other people doesn't seem to be the best way of keeping in touch.
My initial thought was to organise a facebook group, so those that want to be involved can be, and those that don't won't get inundated with 'junk' emails. Is there a better way of staying in touch with a group of people you don't know?!?