What is a medium?

We live in a media society, so much is certain. We hear the
word "medium" almost daily and associate more so now than we
would like. Even video games fall into the category "media",
and this makes the limitation of the concept is not easy. In
December 2005, on this ground in Weimar an interdisciplinary
conference held to just this
question: "What is a medium?"

The website can be audio files of lectures and discussions in
Ogg Vorbis format.