I guess Mr. Baum's book (which among other things strongly recommends the purchase of a rotation sensor) is having an effect :-). I called Lego Shop@Home to order one and was told they are backordered until January 31. (25 years ago, 16-Dec-99, to lugnet.robotics)
(...) Gee, I guess I got the last one, then. :-) I just got mine from them (as well as a "few" other items) a couple of days ago. Glad I beat the rush. (25 years ago, 17-Dec-99, to lugnet.robotics)
(...) Rotation sensors appear to be (finally) available at Lego World Shop ((URL) however. $14.99, plus whatever for shipping ... (25 years ago, 17-Dec-99, to lugnet.robotics)
