That sound you hear? It's the sound of a million webmasters shouting for joy. I certainly didn't see it coming, but Microsoft, Yahoo!, and Google have entered an agreement to support a single, unified sitemap protocol, which webmasters can use to give all three companies' search engines a complete listing of their site's pages. Microsoft's Live Search Blog, the Yahoo! Search Blog, and Google's Webmaster Central Blog all have announcements about the unified effort, and the companies have launched sitemaps.org to promote the protocol. The protocol itself has been released under the Creative Commons license and other search engines have been invited to use it as well. Search Engine Watch has the press release.[Via Techmeme]
