You'll notice that the search box has migrated down from the header to the right sidebar, where it slightly displaces the diaries and board. I've moved the site over to a Google-powered search that is a thousand times more useful than Drupal's defaults.
You'll also note a "Refine" section right under your results. Right now there's just one option that will provide you only message board posts. If anyone has suggestions for other potentially useful refinements, let me know and I'll try to implement them.