Help Needed with a Hook_form_alter Module
I think your not setting the prefix correctly. I think you want to do something more like this:

if ($form_id == ' webform_client_form_289') {
    // Add the directions
    $form['submitted']['#prefix'] = '&lt;p&gt;Do you know of a high-quality resource that should be in our listings?&lt;/p&gt;&lt;p&gt;Please let us know! We will review it before publishing it, and we will follow up with any questions.&lt;/p&gt;';
}


Looks like what your trying to do on in your code is set resource_name to be an array with just prefix in it.