[Matthew] sent us his group’s final project, where they built a great GPS logging system. Not only can it simply log the GPS coordinates on a predetermined interval, it can also be triggered to make an entry by a wireless device. In this example, they use a camera. This allows them to then publish all the GPS information and pictures to places like Google Earth.
They are using an ATmega644, with an LCD, SD card, and GPS unit. They had to do a little hacking on their cam to add the wireless transmitter, which triggers the logger. You can see not only the cost break down and source code for the project, but also a map with lots of geotagged photos. This is the kind of thing we can nearly see as a standard item in the future.