When I click on either of the Scan buttons, a nice feature would be the capability of seeing what are the remote images I'm about to cache. Since some posts may or may not be important to have cached images.
This way, I would like to see something like
bp0.blogger.com (results: 6) [Cache from this domain] [List remote images]
The "List remote images" button should expand a list with the images URL that are about to be cached, and if possible, the weight in KB of them. This way, we will be able to take smarter decisions about what origins to cache and what not.