The TrackStick GPS Data Logger is one of those products that could just as easily be used for good or for evil. It’s looks like a slightly oversized flash drive, but it is actually an autonomous device with a GPS receiver in it. Wherever it goes, it records all the relevant GPS data, including time, date, location, speed, direction and altitude. It runs on 2 AAA batteries which provide 5 to 7 days of use. That amounts to about 4,000 records.

Once you have recorded all the data you want to record, the integrated USB connection lets you download the data into your computer. The data can then be integrated into Mapquest, Google Earth, Google Maps or Virtual Earth, so you can track visually where the TrackStick has traveled.

The TrackStick is available from ThinkGeek for $249.99. It measures 4” x 1 ¼” x ¾”, which is small enough to stash on someone if you want to secretly keep track of them.