We are getting a kick out of these old posters from the Works Progress Administration. Some are pretty funny (see "MILK: For Summer Thirst"), others are quite beautiful, and all offer a glimpse at American life during the 1930s and 40s.
The WPA was one of the first government programs that included support for the arts, and these posters stand as a testament to the program's power. You can find the full collection, By the People, For the People: Posters from the WPA here. To purchase a copy of any of the WPA posters, find the desired print here, write down the reproduction number and contact the Photoduplication Service of the Library of Congress. Prices depend on size and type of print.
(Re-edited from a post originally published 4.16.09 - JL)