AutoMapIt supplies your site with 6 sitemap formats including the XML sitemap that Google is looking for in Webmaster Tools and a human-readable HTML sitemap.
The HTML sitemap that AutoMapIt produces is rather plain, but if you have skills with HTML, it is easy to use the HTML customization page and to add code from your template that will be used above the links and below the links... this is basically what a website is anyway... code above and below your actual page content.
All you have to do is link to /sitemap.html and AutoMapIt will keep it updated over time!
This gives you a seamless integration with your site. If you visit the HTML sitemaps at AutoMapIt, you will see they look like all of my other pages. This was done on the HTML Customization page once when I started with this template and every update adds new links, but the same exact look and feel I use on the rest of my site.
I have looked at the second link on that result. It is odd to see Google list a URL that returns a 404, but I'm too sure that this will be removed naturally by their system.
This may be a good place to mention using custom 404 pages to help redirect human visitors into your site versus having them look at that default screen. Just be careful that you don't create a custom 404 error page that tells Google it's 200 (Found). You can use the HTTP Header Checker at
http://www.automapit.com/headerchecker.html to verify that your custom 404 is returning a 404 HTTP Status code.
If any of this was too technical, there are some great tutorials on the web for what I've explained here. They get into a lot of the details that I can't cover in just one post.