I just consulted it, Rachel is working on it, the biggest problem with the search feature is that it creates a strain on the server and that is why it is disabled at the moment. Since she is working on it I can't exactly tell you guys when will it get back online, but while it happens, here's a suggestion:
Try using the google seatch feature adding site:fanforum on the search engine. It helps you find boards or threads on Fan Forum!