2016 May EECS Wifi-Enabled Robots ESP8266 two wheel-drive robot, serving webpage with controls using SPIFF and websockets, and same for Roomba (over serial interface).
2014 May EECS 6.01x Robots Created $200 robots to replace 6.01 robots, which cost several thousand dollars.
2011 May EECS Countertop Vending Machine Small vending machine to stock Arduinos in student-run machine shop at MIT