This is big news and for sure you will want to update your website with the new sitemap Robots.txt tag that points the top three search engines to your sitemap with auto-discovery features.
You simply need to add this little snippet to your robots.txt file with your correct information inserted:
Sitemap: http://www.example.com/sitemap.xml
It’s simple and the big three are all accepting it! You can click my blog post title to read the full article on the Yahoo Search blog that is acting as the press release.