I didn't knew Microsoft had something to support servlet. But I doubt if they will give support and keep themselves update with the latest developments in Servlet specs. I think the better option would be to use Tomcat Servlet container and use it with IIS. Follow the link for configuring the same.
IIS on its own doesn't support Servlets indeed. Allaire (now Macromedia if I'm not mistaken) JRun will integrate with IIS to provide what you want.
The JW article is now superceded by Microsoft officially declaring their JVM end of life and removing it from their download library. Same with VJ++ which included it. And before you think "hey there's links to old pages which might still have it" they're all redirected to a page describing why you should move to a Sun JVM by now