Hey Eric if you're out there, a 20-years-later edition, looking at a few new programs, formats, and protocols would be grand; as would your comments on which of your statements and predictions have held up best and worst over the decades.
Consider sending him an E-mail, he responded when I thanked him for exactly this book a few years ago! There's an "E-mail me" link on the left sidebar at http://www.catb.org/~esr/.