I do keep the text for "The Confidential Guide" up to date on my latest travels. Unfortunately for my writing career, I'm busy enough with architecture that I don't get around to see other courses like I used to ... and with all the new courses which have been built over the past ten years, I feel like I'm further behind on seeing all the best courses than I was when the book was published.
I don't know if I'll ever do anything with the updates or not. It probably behooves my relations with other architects not to. And I'm not sure what, if anything, I really have to gain at this point. The original book still covers most of the bases.