Geotagging – which embed longitude, latitude and any other location data into a picture file – is great fro remembering where you went on vacation. But it can also cause privacy concerns, say, by letting everyone know where you live when you send around pictures of your fancy new television. The option to include  the location data in pictures you export from iPhoto 09, select the photos and choose Export from the file menu.

In the include section of the File Export Box, check the box next to Location Information to embed the coordinates in the image