I have Charles Taylor's new book, A Secular Age, on the shelf, and will start to tackle it here soon -- probably not in as much detail as I have been looking at Ramachandra Guha, but definitely in some detail.
One of the things I like about Taylor is his ability to bring non-western perspectives into his thinking about secularization, showing just how complicated (and often intertwining) the world's "secularization" narratives have been. His essay, "Modes of Secularism," in Rajeev Bhargava's anthology, Secularism and its Critics, was really helpful to me in developing my thinking about secularism a few years ago, and I'm looking forward to an even more detailed analysis.
Via 3QD, I see that a group of scholars at the SSRC are already discussing the book, and Charles Taylor himself has contributed a post, here.