In the upcoming template I am working on for the new store at tp.net, I use them in the store-front shopping-cart page - and in a sidebar listing, which copy the mainblocks routine. I also used them in search results, for a more narrow row of results there.
I only added this little bit of code after the thumbnail createThumbnail code:
// Create mini-thumbnail!
createThumbnail($modSettings['store_path'] . $filename, 80, 80);
rename($modSettings['store_path'] . $filename . '_thumb', $modSettings['store_path'] . 'minithumb_' . $filename);
..so it will just use the thumbnail name, but tag "mini" in front of it.