bbPress.org

If you don’t want Google to make a cached copy of any your forum pages, use this mini-plugin (Google will still scan and return results for your site, it just won’t show the “cache” link)

function noarchive() {echo "n".'<meta NAME="robots" CONTENT="noarchive">'."n";

} add_action('bb_head', 'noarchive');

Note that some search engines won’t obey “noarchive” and give away a cached copy anyway. This includes Alexa and others. Also note that installing this plugin doesn’t make existing “cache” links disappear instantly, Google has to re-scan your site (eventually) and then “cache” will disappear.