I’ve written a simple plugin to generate the meta information used by the google bot to decide whether to index a page or not. If the page generated is an individual article page, then the plugin will generate:; if the page generated is anything else, the plugin generates: <meta name="robots" content="noindex,follow">.

Scribbling.net has a couple good articles on this which are worth checking out: Noindex and Help the Googlebot understand your web site