Multiple pagers in one page
I believe this is only possible by hacking the core pager functionality, so I wouldn't suggest it.

You could add this to your theme

function MYTHEME_pager_link($variables) {
  $text = $variables['text'];
  $page_new = $variables['page_new'];
  $element = $variables['element'];
  $parameters = $variables['parameters'];
  $attributes = $variables['attributes'];

  $page = isset($_GET['page']) ? $_GET['page'] : '';
  if ($new_page = implode(',', pager_load_array($page_new[$element], $element, explode(',', $page)))) {
    $parameters['page'] = $new_page;
  }

  $query = array();
  if (count($parameters)) {
    $query = drupal_get_query_parameters($parameters, array());
  }
  if ($query_pager = pager_get_query_parameters()) {
    $query = array_merge($query, $query_pager);
  }

  // Set each pager link title
  if (!isset($attributes['title'])) {
    static $titles = NULL;
    if (!isset($titles)) {
      $titles = array(
        t('« first') =&gt; t('Go to first page'),
        t('‹ previous') =&gt; t('Go to previous page'),
        t('next ›') =&gt; t('Go to next page'),
        t('last »') =&gt; t('Go to last page'),
      );
    }
    if (isset($titles[$text])) {
      $attributes['title'] = $titles[$text];
    }
    elseif (is_numeric($text)) {
      $attributes['title'] = t('Go to page @number', array('@number' =&gt; $text));
    }
  }

  // @todo l() cannot be used here, since it adds an 'active' class based on the
  //   path only (which is always the current path for pager links). Apparently,
  //   none of the pager links is active at any time - but it should still be
  //   possible to use l() here.
  // @see http://drupal.org/node/1410574
  $attributes['href'] = url($_GET['q'], array('query' =&gt; $query));
  return '&lt;a' . drupal_attributes($attributes) . '&gt;' . check_plain($text) . '&lt;/a&gt;';
}


You'd need to change this line if ($new_page = implode(',', pager_load_array($page_new[$element], $element, explode(',', $page)))) { to use the separator you wanted.

But you'd also have to change a line in Drupal's core pager include (/includes/pager.inc)

In this function you'd change the character in the explode to what you want to use.

function pager_find_page($element = 0) {
  $page = isset($_GET['page']) ? $_GET['page'] : '';
  $page_array = explode(',', $page);
  if (!isset($page_array[$element])) {
    $page_array[$element] = 0;
  }
  return (int) $page_array[$element];
}


Edit: keep in mind, this will break pagers that are not using your theme which means your admin pagers probably won't work unless you do the same for your admin theme.