Kiki Mills at MITX introduced me recently to Doug Turner, whose past includes eight years as a member of the 3D graphics research team at Apple's Advanced Technology Group. Doug and I met for breakfast and talked shop about digital media. One of Doug's ideas, which I found particularly interesting, is (his words) the concept of "media as software". Right now rich media streams are largely analog audio and video once they are "published". (If you've composed or edited a digital video "project" and then converted it into its final form, you know what I mean.) Doug describes this as publishing digital media as platforms on which other people can add/edit their own stuff.