Or rather, if you geotag your tweets and photos as carelessly as the average microblogger, they know where you sleep, work, and potentially engage in far more private activities.

FORBES: Researchers Show How Twitter, Twitpic Make Stalking Simple

As you might expect from a camera in this price range, Nikon threw in embedded WiFi and GPS, letting you geotag and upload your pics directly from the camera.

ENGADGET

Old hat -- Neurowear wants to geotag your mood.

ENGADGET: Neurowear wants to read your mind, geotag your feelings (video)

We've seen a number of headsets tap into the mind, to geotag your mood, grant you remote control over gadgets or simply let you wiggle a pair of cat ears.

ENGADGET

When posting photos from the app, which Agarwal believes will become a major use of the app, people can quickly geotag a photo, snap a photo from the iPhone or select an existing photo from iPhone albums without even leaving the app.

FORBES: Posterous Is Now 'Spaces,' A Photo-Focused App For Private Sharing