There were requests from all around to see video of the electric "Mini MINI" radio-controlled cars that are being used to retrieve javelins, hammers, shots and discus' (disci?) at the London Olympics, and here it is.
The Olympic-liveried electric Cooper hatchbacks in roughly 1/4-scale ply the infield grass. The couriers are loaded up by judges in the field, who slot the particular sporting implements into holders built into the roofs, then the cars are driven back to the judges near the throwing area for retrieval.
Based on how many comments on the Mini R/C cars we've seen that are some variation of "Do want," we wouldn't be surprised to see these again somewhere else. You can watch them work in the videos below.