Having read this blogpost, I wonder when we will appoint pro-tem Moderators.
The first post states that the nomination should begin approximately 2 weeks after the private beta begins (and 12 days is approximately two weeks):
If your meta site does not have a post to nominate Moderators, start one now! Pro Tem appointments will begin about two weeks after the site is created. The more guidance we receive, the more informed our choice
(highlighted by mee)
I don't know whether it may be a bit too early for this but this page should go public in about 5 days (stated on the message informing visitors about the private beta of this page) and I suppose @RobertCartaino and the community team won't complain if they get some pro-tem moderators to help them.