Andrew Stafford, "bookseller in San Francisco"  has two enduring websites that appeal to anyone interested in putting content on the web and/or avant-garde art. Making Sense of Marcel Duchamp  includes animations and interactive sections that celebrate the multimedia abilities of the web. You can spin the Bicycle Wheel or manipulate the allegorical automata of The Bride Stripped Bare by Her Bachelors, Even. An excellent way toward understand the art of this major 20th century artist.
His other great work is Aspen Online , the digitization of Aspen, the hippest art magazine of the 1960s. Each issue came in a box filled with booklets, phonograph records, posters, postcards, and even film. Contributers included John Cage, Andy Warhol, Merce Cunningham, John and Yoko, Phillip Glass, Kate Millet, William S. Burroughs, Lou Reed, and dozens of other prominent cultural figures of the day.