To whom it may concern:
When will the Theoretical Physics private beta begin?
Any day now. :) The private beta process involves human intervention, both in the logistics of setting up a new site and from our community team to provide your initial moderation and guidance. It's common for proposals to spend a few days at 100% before the private beta begins, so please be patient with us (and consider this a great time to do last-minute recruiting of experts in your field!).