Thomas Pfeifer decided to experiment with Tyco X1029-A-53 GPS module. He built a Atmega8 prototype board which reads GPS data and logs it to MMC/SD card every 1 second. So later data can be analysed on computer or simply put on top of the map (easy to do with Google map) to see the where did you go.
He made several experiments by driving with bicycle around around his place. In one of them he managed to draw his name on the map.