The Wisconsin Historical Society has just posted a large collection of tall-tale postcards online, along with some accompanying history. Definitely worth checking out. Highlights include galleries devoted to two early masters of the tall-tale genre, William H. Martin and Alfred Stanley Johnson. It's also possible to buy reproductions of these prints through their website.

The only thing I find regrettable is that their site is full of all kinds of warnings threatening people not to use any image from the site without first obtaining written permission from them. If an image is public domain (as many of these tall-tale postcards are, since they were published before 1923), then can the Historical Society actually set conditions on their usage? It seems to me that would be like a publisher selling Shakespeare's works along with a warning that their permission must be obtained before any play is actually performed.