Rated 4 out of 5 stars
... will make it even better. I'm anxiously waiting for the new version. While you're at it, here's another possible feature: allow to click on a "removed" image in order to display it (just like NoScript does for flash etc.).
I'm not sure if that would mean to allow the entire domain or just that one image. The latter might be tricky to implement, and probably the former is even more useful. Something like "This image comes from http://example.org/. Clicking ok will allow all requests to that domain. OK/Cancel" or something along these lines.
This would eliminate the guesswork which domain has to be allowed in order to see images. (Which can be pretty tricky on sites which include a lot of content from, like, 37 external sources)