The last couple years have been tough at the company for which I work. To get a tiny bit of the community spirit back, one of the head nerds here had the idea for a Nerd NASCAR and we had the "first annual" last Friday. The idea is a competition among fully autonomous robots to follow a black line (electrical tape) on a (somewhat) white floor. About the only rules were the requirement of an M&Ms tin as a body and some physical size restrictions. Each bot got three runs...overall fastest run would be declared the winner. In addition, a "coolest" bot award went to the people's choice.
6 bots showed up. The winner of both fastest and coolest awards was Scrapper, a completely analog design that used visible-light sensors and the most complicated mechanical design of the group. The Lego bot used the Lego RCX "brick" as a controller while the remaining four bots all used some version of the Atmel AVR microcontroller and homemade IR sensor array boards.
Winning time for the 145' track was 38 seconds...approximately 4'/sec.