I like this idea. You could even take it a step further by giving a few rotating community members "mentor" status and be assigned new posters. Their job would be not only to manually approve the new poster's initial 10 or so posts, but also to provide helpful feedback on what is an isn't an appropriate question/comment.

So a new poster tries to post a question thats been answered 10 thousand times before, and the "mentor" would kindly direct that user towards the search. That would make the community seem 10 times nicer since we wouldn't be jumping all over new posters while simultaneously making smarter forum-goers.