Facebook appears to have added a shutterbug's dream feature: Face detection technology. As soon as you upload a picture, the feature realizes that there are humans in it and preselects their faces. You just add the poor souls' names.
Picasa does this also and it's actually really creepy. It finds faces in things like clouds, mountainsides, reflections on the walls. I spook easily and am always uneasy in the kitchen now because Picasa found a face in the woodgrain on my cabinet. Now it's all I see.