Ninwa writes "Google has launched Google Sitemaps. It seems to be a service that allows webmasters to define how often their sites' content is going to change, to give Google a better idea of what to index. It uses some basic XML as the method of submitting a sitemap. More information on the protocol is available in an FAQ. What's most interesting is that Google is licensing the idea under the Attribution/Share Alike Creative Commons license. According to the Google Blog, this is being done '...so that other search engines can do a better job as well. Eventually we hope this will be supported natively in webservers (e.g. Apache, Lotus Notes, IIS).' They even offer an open source client in Python."