This GPS based car speed and position logger is based on Olimex LPC2148  project board, which is wired to GPS receiver. GPS receiver is interfaced via serial port - so not much of soldering.

Software is based on FreeRTOS where ChanFS file system is used for storing logged data in SD/MMC FAT16 formatted card. It also has USB serial port emulation which enables to monitor NMEA sequences or simply retrieve logs as from mass storage device without removing CD/MMC card. Project files for WinARM GCC can be downloaded here.