This is Flickr for busy people.

It is a simple web application that displays a list of your Flickr contacts who have uploaded photos in the last 30 minutes, two hours, four hours and eight hours

If you click on a buddyicon, the application will display thumbnails of the photos that user has uploaded recently. Like this:

flickr for busy people screenshot

→ Sign in to get started

The first time you sign in you will be taken to Flickr and asked authorize the flickrforbusypeople application. You should only need to do this once.