A bunch of apps will track you short-term, like if you're going on a run or a hike. The only one I know of that tracks you long term is Google's Latitude. It wants you to share your location with friends, but I could just not add any friends. The main sticking point is that I'm not convinced that it will work without internet. Any ideas?
Travel update: I'm in Chicago, it's big and exciting, and my friend Erik and I have walked to Intelligentsia, a zoo, and two delicious restaurants; drunk wines that I didn't know existed; and eaten the bellies of two different animals. (at the restaurants, not at the zoo.) It has been a wonderful, and decadent, day.
It is hot here, flat and griddy, and sometimes it rains for serious. I like it.