Title says most of it. Almost none of us have more than 1 reputation point yet, and we thus don't have enough reputation to comment yet. Except for those of us who participated in TP.SE, we don't have any rep from our SE activity yet.
So, could the commenting rep limit be lowered to 1 for now, so as to remove this hindrance (we really need the ability to comment for meta issues).
The limit can be raised again later after the private beta.