This marks another milestone in the very long history of this web server. Back in the 90's this was the Netscape Enterprise Server, which later morphed into the iPlanet Web Server during the Sun|Netscape Alliance. After some years it was renamed the SunONE Web Server and most recently renamed again to the JES Web Server (Sun just like to keep you confused, thus the constant renaming of the product!)
Whether or not this is the first project Sun has published under the BSD license or not I am unsure of (thought many think it is... but seeing who one of the founders of Sun was, wouldn't it be odd if it was?)
Link to the project http://blogs.sun.com/jyrivirkki/date/20090113
And yes for those who also ask, I've had no luck getting ZFS moved to the GPL, let alone the BSD license. But I will keep asking internally :)