Aperture 3 expands on the power of Faces in iPhoto ’09. Not only can you view the people you name across the entire library, you can now see them in individual projects. And the new Show Unnamed Faces pane displays all the detected-but-not-yet-named faces in a project to help you easily add names.
Now you can use GPS location data to explore your photos by the places they were taken. Better still, find them on an interactive map.