From Techcrunch we have learned that Microsoft, Yahoo, and Google will sideline their search engine war games for a universal sitemap protocol. The protocol will allow you to get your sitemap indexed on all three search engines without submitting to each one. For example, Google Sitemap users will soon have their sitemaps indexed on both Microsoft and Yahoo Search. The protocol is based on sitemaps.org and is xml based.
You can read the entire article at Techcrunch.