I would look into a knowledgebase sort of wordpress application. For example http://debthelpdesk.org is a site that has their search built into blog posts, faq entries, files, forums...basically any public information they have setup on the site.

I believe this is the plugin that was built into their theme http://codecanyon.net/item/knb-wordpress-knowledge-base-wiki-shortcode-/full_screen_preview/8937609

You will also need a developer to allow for you to automatically upload a spreadsheet of data to make things easy