Thanks for the response. Though mp3car.com is nowhere near a big board, the visitor activity isn't that low according to Google Ad Planner.
Regarding the search, my understanding is that VaultWiki uses first post in a thread as an article content. Does VaultWiki have a special script for handling just article searches? I can't see any dedicated wiki search fields in the demo pages, and the search field on the main page (http://www.vaultwiki.org/demo/) seems to be broken. For example, searching for "namespace" throws this error:
Fatal error: Call to undefined method vB_Search_Criteria::get_notequals_filter() in /home/crackede/public_html/vaultwiki.org/packages/vaultwiki/search/type/vaultarticle.php on line 91