Data Privacy Day is held every January to increase awareness of privacy issues in our everyday lives. This year, the focus is on new services that track where we are and then can share our location with friends or with the public. Services that use this kind of location tracking b ring up new issues...

New GPS technologies like Facebook Places, Foursquare, Twitter, and others can track, analyze, and share our movements in the public sphere. But what are the privacy implications? Will we be expected to take responsibility for our own locational privacy and reputation? What role will the government...