Version 0.91 update:It works for non flickr.com images,have fun! Get Flickr Thumbnails plugin can get thumbnails for photos on your site that from flickr.com,you can choose recent or random mode,and it will link to your own post.

Get Flickr Thumbnails

Get Flickr Thumbnails plugin can get thumbnails for photos on your site that from flickr.com

Konstantin Kovshenin

Use this widget to display your Flickr photos in your sidebar, via a Flickr username or a Flickr RSS feed URL.

Quick Flickr Widget

Display your Flickr photos in your sidebar.

Get Flickr Thumbnails vs Quick Flickr Widget