Are we the ones that can read and post to this service?
It's centred around discussions, which are public -- but only invited guests can post. Any of us can start a discussion and the ones that have legs I'll post in one of our story pages on the Globe site like a live chat or a Storify. If we don't publicize a discussion (through Twitter or our own site), it's unlikely to find any kind of audience because, for now, Branch has no search tool. But the discussions are public.
Creating the group allows any of us to invite our colleagues to a discussion in bulk. You can also do invitations individually.
I'd love to hear any feedback on how usable the tool is and what ideas you might have for it.