Isn't it handy to have that Palm/Blackberry/iPhone/Android or whatever device that allows you to automatically upload pictures to FaceBook, Twitter, or anywhere public? I think these devices are pretty awesome and definitely help keep us all connected. Did you also know that your device is probably telling everyone exactly where you took your pictures? These phones are using a metadata structure called Exchangeable image file format or Exif. If you want to get particularly nerdy, you can read this link to understand more about that format. For those of you who just want a non-technical description, this is information about your image file that is stored "within" the picture file. Some of that information can be that location the picture was taken. For example, here's a picture of my brother and I at my sister's wedding:
[Make ] = "google"
[Model ] = "Nexus One"
[GPSLatitudeRef ] = "N"
[GPSLatitude ] = 39 deg 37' 0.000"
[GPSLongitudeRef ] = "W"
[GPSLongitude ] = 106 deg 5' 0.000"
[GPSAltitudeRef ] = Above Sea Level