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

pekastel

Lets you pick a Creative Commons picture from Flickr and use it anywhere you want on your WordPress installation. The plugin will maintain attribution to the original Flickr author to keep peace with the CC Attribution License.
This plugin makes use of the newest WordPress 3.4 feature that allows to embed html in image captions, and also is backward compatible with older version of wordpress as well.
Features:
<ol>
<li>Search photos from flickr with creative commons license by tag (since version 1.2 you can search by any type of license)</li>
<li>Preview image results.</li>
<li>Define the order of the search results.</li>
<li>Automatically add image caption that links back to the original flickr owner.</li>
<li>Lets you use the standard features provided by WordPress for image editing:
<ul>
<li>Image alignment.</li>
<li>Cropping.</li>
<li>Rotating.</li>
<li>Flipping.</li>
<li>Resizing.</li>
</ul>
</li>
</ol>

Flickr – Pick a Picture

Lets you pick a Creative Commons picture from Flickr and use it anywhere you want on your WordPress installation.

Get Flickr Thumbnails vs Flickr – Pick a Picture