Funny, I got rejected for an AOIR conference because this topic was "over" and "nobody was talking about it anymore." And that was several years ago! Oops. Anyway, Andrea, I talked about the real/virtual divide and the continuum extensively in my dissertation. You can find it via Google on OhioLink but I have cleaned up the grammar from the initial draft and posted the PDF on my website: http://www.dlfilms.com/professional/dissertation.html