"perhaps no one could enter certain communities with a 'key' to decrypt everything inside...which , being encrypted, would be unintelligable to anyone outside?"
This sounds as practical a way as any to implement the promised features. I have no idea how it is being done. I'm not sure this is ready for HF20 though, which I think mostly contains improvements to user onboarding and some minor changes to curation for self-voting, etc. I don't think communities were ready? Could be wrong, didn't research.
I dunno either.
it'd be kinda nice if Steemit would pay a little more attention to keeping us updated?
ya think?