Answer

function YourThemeName_preprocess_page(&$variables) {
  foreach($variables['node']->taxonomy AS $tax_term) {
    $variables['wowzers'] .= ", $tax_term->name";
  }
  $variables['wowzers'] = substr($variables['wowzers'],1);
}

After entering this in your template.php file the variable $wowzers will be availble for use within your page.tpl.php file.

Please note you can only use one preprocess function per template.tpl.php file.