Years in the making, but I have FINALLY updated the support site for my Absolute Beginner’s Guide to Building Robots. I’ve corrected mistakes from the book, added a few hacks and clarifications, and provided links to things like the PDF instructions for making “Mousey the Junkbot: (as it appeared in Make vol. 2) and to a video clip from a guy who made of a version of the DiscRover with added edge-detection capability.
It is still highly recommended that anyone building the projects in the book read through the “Building Robots” conference on Shop Talk for current info, but most of the critical problems/changes to-date have now been added to the robot pages.