www.sun.com is now reporting its server signature as "SunONE WebServer 6.0". We think that this is simply part of the rebranding of the web server away from Netscape-Enterprise, rather than a new product.
www.coke.com appears to have switched from AIX to Linux, but in fact this is a feature of it starting to use the Akamai network for its front page.
NASA are now running something called "NASA_Webserver/2003 (NASA) mod_jk/1.2.1-beta-1" on Novell Netware. We think that this is likely to be a locally modified Apache running behind a Novell ICS reverse proxy server. In contrast to Kellogg's, NASA appear to have moved the site off their own network to AT&T.
Meanwhile, www.walmart.com have made a change to their server signature to make it appear less obviously like a copy of Apache with a hand edited server header, and more like Microsoft-IIS. We speculate that forthcoming site enhancements at Walmart may include changing the name of the JServSessionId cookie.