zlacker

>>pg+(OP)
Make it invite-only to post threads/comments and quietly associate the inviter with the invited person.

>>Sargis+51
Thus ensuring that we don't get spontaneous comments from e.g. the UX guy at Zappos on that story about Zappos. A non-starter, I think.

>>tptace+c1
That could be worked around, contributing could be invite only, but also allow a non-invited contributor to post but their post would be collapsed (or at a negative score) by default until an invited contributor voted it up.