I totally almost gave myself a heart attack. Earlier I'd looked up the maximum page counts with Amazon's print-on-demand program, and the number 480 had stuck in my head. So, I'm laying out this book, and I've got a few chapters to go, and I'm up above 460 pages...yoikes....
But then I looked it up again, and it's a maximum of 480 for a color book. For black-and-white text, the maximum is 828 pages, and I'm well below that.