Hi all,

We've released a new API method called
flickr.contacts.getListRecentlyUploaded that will return a list of
users and the number of photos they've uploaded within the last (n)
minutes (though no more than an hour).

http://www.flickr.com/services/api/
flickr.contacts.getListRecentlyUploaded.html

The response value is just like the other "getList" contact methods
but each user element also contains a @photos_uploaded element.

Queries can be filtered by all your contacts or limited to friends
and family only.

Enjoy!