I don’t see much of an easy way to edit image attributes for Pinterest optimization. “Pin It” buttons for Pinterest can pre-format pins by reading from specific image attributes. They seem to be becoming very popular on blogs. You can read more about image attributes for Pinterest here. I particularly would find the “data-pin-id” and “data-pin-url” attributes the most useful.
Furthering support for easy Pinterest integration would be awesome. Pinterest is a huge traffic source for a lot of bloggers, so I think that this would be valuable for many. Perhaps creating a Pinterest card like done for Facebook and Twitter as seen in the Post settings.