I was excited to hear that Yahoo and MSN have taken up the sitemaps format. And today I was adding one of our niche e-commerce sites to Yahoo and noticed that they upgraded there Site Explorer to include sitemaps and site authentication.
However, Yahoo requires that you add a phisical html file to the site for verfication. Which, might not be a big deal unless your entire site is run by a custom content mangment system. It would be alot easier for us if I could just add a <meta tag like Google’s Webmaster Tools site verfication method.