When I am editing books in Calibre, a lot of time I can't find covers when searching for metadata. Generally, I end up going to
www.goodreads.com and taking a cover from there. I know Calibre is pulling info from Amazon now, so would it be possible for Calibre to pull info from Goodreads as well? Also would it be possible to preview covers before adding them? I know there's a checkbox that shows if a cover is present with that metadata, but what if instead of a checkmark there was a thumbnail of the cover? I don't know if any of that's possible, but I'm going to throw it out there as a wishlist item. =)