Sorry but I'm not really sure of the purpose of the moderator preview on some posts, I have seen it twice so far today, is it some form of flood control or something? Please fill me in, I'm a bit lost here.
Right, I see, it's just kind of annoying to have to wait for the posts to be approved when a topic could well have taken off from that point originally posted. I can understand the idea of needing to keep an eye on new users though.
Maybe you could see if someone could make a flagging system though, so if users with 500+ posts see some breaking rules, they flag them and enough flags cause the user to be put on moderation and all previous posts by them hidden. Not sure how possible that is though.