Flickr Delves Into People-Tagging

Flickr's representative wrote, "The first time someone is added to a photo they will immediately receive an initial email notification alerting them that their image has been added.  After the initial approval, the notifications will appear on the member's recent activity on the homepage and through email activity updates. . . .  [M]embers have full control over their privacy and can choose who can add them in photos, which photos they are added to, or opt out of the feature completely."

People in Photos is likely to have Flickr users spending more time on the site and perhaps bringing in new friends.  What should be interesting to see is how Facebook responds.