I have been searching through your forum and have found that there is a lot of good ideas and tips for a variety of PHP problems. But the real nightmare is if you do a search for almost anything you will most likely have somewhere over 1000 threads returned for you to look through and most times only a handful may be relevant.
My though is this, I am sure you have notice that you have forums that have 60,000+, 30,000+, and 20,000+ threads. It is a daunting task to even think about reading through them to find answers. I am just wondering if you have considered the possibility of breaking up each topic into additional subtopics were a person might be able to narrow there search to a more relevant topic.
I think you have one of the most informative and helpful discussion boards and I would hate to see that change just because people could have trouble finding the information they need, quickly.