I can get an RSS feed of my contact's photos via http://www.flickr.com/photos/friends/ , at a URL of the form:
And if I change the
friend=1 then I'll get a feed of my friend's photos only.
However, the contacts feed will contain both friends and non-friends photos, so if I subscribe to both I'll get duplicates.
How can I get a feed that contains only photos from contacts who aren't friends?
I thought I might be able to achieve this using Yahoo Pipes, but I haven't figured out how.