I've decided that I'm going to try out one Drupal module a day on this site in addition tp any content that I might add. Today's module is the one to generate a sitemap of all the filenames that are available for Google to crawl.
Google sitemaps give the webmaster the ability to tell google which files exist and when the last time they changed. This reduces the bandwith requirements for both Google and my website. It also lets Google know when a new page has been created, so it you don't have to wait for Googlebot to find it on its own.