Welcome! This site hopes to highlight some of the history of the Debian project by making available virtual machine images (and sometimes install media) for archived Debian releases. Debian has a long history dating back to 1993. Some of that history is retold in http://www.debian.org/doc/manuals/project-history.
I started using Debian 2.1, and like so many others immediately became a fan. I've used, deployed, and contributed to Debian for many years and while the majority of my focus these days is on Ubuntu, I still admire and contribute to Debian.
Interestingly enough, it was at the Ubuntu Developer Summit in December of 2008 that I started playing around with old Debian ISO images for Bo and Hamm in KVM (thanks Marc Deslauries!). I was inspired to create a collection of old Debian installations on my computer, and after talking with Debian maintainer Arnaud Quette and Ubuntu developer Dustin Kirkland, I knew I was onto something and wanted to make these images available for all to enjoy (though, as I did this in my spare time, it took a bit longer than expected, but better late then never! :)
Thanks to Canonical Ltd. and James Troup for allowing me to host this site and to Debian for such a great operating system, whether on its own or as a basis for derived works.
The basic idea is to do a basic, bare-bones installation with everything setup so the user can login, install software and reminisce about days gone by. Enjoy!