It is only right that on Facebook's fifth birthday a whole new social networking stalking technology is introduced to the masses. Enter Google Latitude.

Latitude lets users broadcast their location to their Gmail contacts. The program, which can be used on a home computer or mobile device, places users names (and a picture, if desired) on a Google map for their friends to see. Latitude will also tell how long a user has been at a certain location.

Other things that will tell you where someone is and how long he or she has been there? Twitter feeds, Facebook statuses, creepy guys hiding in bushes with binoculars...