This is the third iteration of w4mp.org and we have made every effort to keep the old sites accessible, because that makes the Web stronger.
The original site ran from 2000 to February 2004. You can see it here. It was a collection of static pages built in FrontPage.
The second site ran from February 2004 to October 2012. You can see it here. It was built using Microsoft ASP.NET using FrontPage and Expression Web, with a collection of Access databases and forms developed using Microsoft Wizards and webbots.
The current site went live in October 2012.