There is post queue for users below certain reputation level. However, it makes more sense if this was only for the first post of the new users.
We had a spam user registration several days back and he posted more than 100 posts at once with a very regular email address and nickname, we also use Honeypot, StopForumSpam and Re-Captcha. So, clearly he was very motivated to make advertisement of his product
There is also waiting time between posts for certain reputation threshold, however we cannot adjust the thresholds separately.
We would like to keep a reputation level (maybe 5) for waiting time, it makes sense; however really do not need a threshold for post queue, because we started to spend a lot of time for approving posts although threshold is only 1.
So, I suggest addition of this feature, where we will only approve the first post of the new user, after he/she is approved, then he/she will be cleared. However he/she has to wait between posts till they reach to a certain level.
I think this settings will make sense to many forums.