Vaudeville
This site, sponsored by the University of Virginia, includes everything from background information to audio and video files, recommended reading, and links.
The Baseball Almanac
This site is jammed with information for the baseball history buff. Facts and trivia, statistics and biographies—it’s all here, even the attendance records of the current and past presidents.
Tin Pan Alley
This site provides good information, some nice images, and useful links. Check it out.