Hurrah, we now have improved support for Flickr. If you subscribe to any of Flickr's RSS 2.0 feeds, you can use the ENCLOSUREURL tag to get access to the thumbnails inside the Flickr feeds. We've also created a new default template called "Flickr Slides" to help you out.
Simply create a digest using a Flickr RSS 2.0 feeds, use the Flickr Slides template, and you'll get a digest like this:
You can, of course, tweak the template to your perfection. The above example uses the RSS feed for the 'yellow' tag on Flickr, by the way :)