Well the thing is that if the kiddies aren't going to search among all threads, they're not going to search among only the solved threads.
The thing I keep trying to point out is that, from a search engine optimization point of view, Google sends us the majority of all our traffic. Google sends us newbies because the existing threads are aimed towards newbies. It's a viscious cycle. If you guys start seeding the forum with interesting questions, Google will pick up on those, and send more advanced users. You don't even have to answer them yourselves. Just start posting random, interesting questions that would peak your interest, and Google will send more experts to answer them.