hi,
i need embedded relevance in content
i make this changes:

1. added function in relevance.module

function relevance_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  $enabled_types = variable_get('relevance_type', array());
  if (isset($enabled_types[$node->type]) && $enabled_types[$node->type]) {
    switch ($op) {
      case 'view':
          $relevance_links = _relevance_load();
          if ($relevance_links) {
            $node->relevance_links = $relevance_links; // i must customize my node.tpl.php or
            //$node->content['relevance_links'] = array('#value'=>$relevance_links,'#weight'=>101); // automaticaly input links block in content region
          }
        break;
      default: 
        break;
    }
  }
}

2. changed consist function in relevance.admin.inc

function relevance_settings_form() {

  // types
  $types = node_get_types('types');
  $enabled_types = variable_get('relevance_type',array());

  $form["relevance_type"] = array(
    '#tree' => TRUE,
    '#type' => 'fieldset',
    '#title' => t('Types'),
    '#description' => t('Configuration node types where block will be display.'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );

  foreach ($types as $key => $type) {
    $form["relevance_type"][$key] = array(
      '#type' => 'checkbox',
      '#title' => $type->name,
      '#default_value' => (isset($enabled_types[$key]) ? $enabled_types[$key] : 0),
    );  
  }

  // vocabularies
  //... ... ...

demo site - see div id = "relevance-links" bottom of node->body