The New York Times has released TimesMachine, a specific wayback machine that allows you to browse replicas of past issues, from September 18, 1851 to December 31, 1922. Hovering over an article brings a little box that contains the beginning text of the article and a link to read more, which opens up a PDF of the full text of the article. Each PDF even has its own URL, so you can link to it.
It’s loads of fun to play with, and I think the educational potential of this is inspiring. I’ve been looking at the news printed 100 years before I was born, and I’ve been having a ball.