I’m guessing quite a few of us media/ip/tech law professor-type-folks can make use of this new site from Philipp Lenssen at Google Blogoscoped:
The site features a browsable and searchable gallery of over 100,000 print ads which I’ve categorized into tags and years, where available, cropped, scanned from books (mostly with the help of a scanning company), collected from CD-ROMs (like Marvel’s full run of Amazing Spider-Man) and websites (like eBay), found in Google Books’ magazines and more.
It joins Philipp’s existing and also useful “Cover Browser” site.