Looks interesting. Thanks, etaoin. Thought I'd mention contemporary American philosopher, Arthur Danto, who has several books out on these kinds of questions: The Madonna of the Future: Essays in a Pluralistic Art World, The Philosophical Disenfranchisement of Art , Beyond the Brillo Box: The Visual Arts in Post-Historical Perspective, and others. Hilary Putnam and Richard Rorty are also contemperary and their books are rather accessible and available.