First of all: Thanks again for this awesome plugin!!
There's one little thing though we have to change in the code every time you update the plugin:
It would be great if the thumbnail names are changed from 'Zemanta Related Posts Thumbnail' to the post title, by editing line 73 in thumbnailer.php from
'post_title' => 'Zemanta Related Posts Thumbnail',
'post_title' => $file_array['name'],
This is also better for SEO purposes.
Please let us know if this can be done in hte next release.