I recommend J. Henry Chunko's October 6th John Cage wrap-up, which begins with his apt admiration for Cage's 1977 performance of Empty Words. He calls it "this jaw droppingly incredible recording." (He's pointing to this.) And then he just enthuses across other links and references. Along the way he mentions my Cage stuff in English 88.
The new book, The Rest is Noise by Alex Ross, was reviewed yesterday by the Chicago music journalist Marc Geelhoed on his "Deceptively Simple" blog. Lots of John Cage there too.