flickr photosets – share you Flickr images with facebook friends
You do not need to authorize the app in order to view photos from your friends with Flickr accounts.
It display a small selection of your photos or sets of photos right side of your Facebook profile.
You can categories your images as most recent photos, fairly recent photos, or even random photos. You can also choose to filter the photos by specific tags.
Flickr photosets respect your privacy settings which you have on your Flickr photos. By default, only photos marked as public on your Flickr will be shown on Facebook.
but you can easily change the privacy setting and allow Flickr Photosets to show the photos you have marked as Private.