Are you a SEO-conscioncious webmaster? Of course, you are!
And you already have a nice, standards-compliant XML sitemap! Congrats! (Maybe you used a Joomla component to generate it on the fly - Brilliant!) You even had submitted it to the Google! Great! And you think you can enjoy from now that well-deserved pina colada, right? Hold on, you have some important tasks to do!