The title, Transcendent Interactions, refers to the goal of designing and developing software with the explicit understanding that any given interaction may exist outside the applications and systems produced. People will carry their relationships from an IM client, to email, play together in a massively multiplayer game, trade points on a discussion board, etc.
This occurs now, "naturally", through loosely joined applications, open standards and APIs. But the full impact on the design of individual applications has not been felt. In fact ...