Digital Home Thoughts: Facial Recognition Coming to Windows Live Photo Gallery

"Imagine this. You connect a digital camera to your PC for transferring photos and the software is able to recognize family members and friends in the photos by their faces. Well that’s something new coming in the new release of Windows Live Photo Gallery - it will include a special "Face Recognition" feature where the software will automatically recognize different faces in in your personal pictures and will also let you add those names as tags."

Pretty sweet feature for automatically tagging your photos. From the privacy standpoint, I'm wondering if it will only tag people you have previously identified in your gallery or whether it will be able to tag people in the background who might have already been identified in other photos.