Yesterday my friend Marsha, sent in two more sites that are graphics treasure troves. Since her comment is buried in the comments I didn't want anyone to miss these two additional sites:
First up is the wonderful "amassblog" by James Phillips Williams. A blog about his collections, many of which have to do with typography or design (he's a designer in NYC).
I've only had a few minutes to scroll through recent posts, but there are some wonderful things here, with lovely clean photography! (I really also liked the photogram of his paper clip collection.) It's definitely a blog to spend some time on.
Next Marsha sent me a link to Full Table where they posted some book covers which will probably matter to you if you've been in publishing for a bit. Go check them out too. When I poked around a bit more at that site I found this was by Chris Mullen and is called The Visual Telling of Stories. I'm just going to warn you that one can get lost here for quite some time looking at all that is gathered together.
You've been warned.