x-ray delta one's flickr stream is filled with thousands of scans assembled by a one-man library named James Vaughan. The collected ephemera contains brochures, ads, and magazines from the world of air travel, cars, trains, and lots of other things. No matter where you dive in, there are always treasures.
Hey Oscar Wilde! — A spot to archive nerd images of interest from out of print/hard to find art books, magazines, comics and other assorted ephemera laying about as well as detours into other things found about the web. Some of the pieces from the 'Hey Oscar Wilde! It's Clobberin' Time!!!' literary art collection (previously on MeFi) may make it on here from time to time as well.
Remember Paper is a blog with photos of interesting magazines, books, and other paper-based ephemera. NSFW.
Agence Eureka is a French language image-blog with hundreds or even thousands of scanned illustrations, mostly from mid-20th century French schoolbooks, educational material, magazines, and ephemera. The current front page is slightly NSFW. Some of the categories include anatomy 1 & 2 (mildly NSFW); chocolate wrappers/trading cards; bricolage; decoupage (cut-outs); math education; playing cards; books and magazines; cars; cinema; orientalisme; sport; mild pin-ups; and many others (scroll all the way down the right to see the tags). [more inside]