Order Signup Administration List

Sorry for the delay, but yes, I was asking to sort on custom fields. Right now I'm just hacking it to do so. What I did was edit my template.php and added in the phptemplate_signup_user_form() override. There, I added first and last name fields:

function phptemplate_signup_user_form() {
  global $user;

  // This line is required for this form to function -- DO NOT EDIT OR REMOVE.
  $form['signup_form_data']['#tree'] = TRUE;

  $form['signup_form_data']['first_name'] = array(
    '#type' => 'textfield',
    '#title' => t('First Name'),
    '#size' => 40, '#maxlength' => 64,
    '#required' => true,
  );
  $form['signup_form_data']['last_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Last Name'),
    '#size' => 40, '#maxlength' => 64,
    '#required' => true,
  );	

...

In signup.module I altered signup_node_admin_page() (around line 1517) to re-order the rows in the $rows array populated from the DB. Altering the order in the DB query itself was basically impossible without really complicating the SQL:

    // Build the row for this user.
    $rows[] = array(
      $username .'<br />'. gmdate(variable_get('signup_date_string', 'M jS, g:i A'), $signed_up_user->signup_time + $offset),
      $signup_form_data,
      drupal_get_form('signup_user_cancel_form_'. $id, $id, $node->nid, $signed_up_user->uid, $signed_up_user->anon_mail)
    );
  }
  
  //NEW: sort rows alphabetically by last name
	function compare($x, $y)
	{
		$last_name_1 = explode('last_name: ', $x[1]);
		$last_name_2 = explode('last_name: ', $y[1]);
		if ( strtolower($last_name_1[1]) == strtolower($last_name_2[1]))
	 		return 0;
		else if (strtolower($last_name_1[1]) < strtolower($last_name_2[1]))
	 		return -1;
		else
	 		return 1;
	}
	usort($rows, 'compare');

Not a huge deal, but it's always nice when you don't have to modify the core module code.

Thanks dww, I appreciate it.