All users in the site map

Hi!
Could not find a plugin function that allows you to display all registered users in the site map.

A temporary solution changed the sql query:

$sql = "SELECT DISTINCT
							u.ID,
							u.user_nicename,
							MAX(p.post_modified_gmt) AS last_post
						FROM
							{$wpdb->users} u,
							{$wpdb->posts} p
						WHERE
							p.post_author = u.ID
							AND p.post_status = 'publish'
							AND p.post_type = 'post'
							AND p.post_password = ''
							" . (floatval($wp_version) < 2.1?"AND p.post_date_gmt <= '" . gmdate('Y-m-d H:i:59') . "'":"") . "
						GROUP BY
							u.ID,
							u.user_nicename";

this

$sql = "
SELECT
	ID,
	user_nicename,
	user_registered AS last_post
FROM
	wp_users
";

it works, but when you update the plugin code will fly. Please add the plugin can display all users.

Thank you.