The Miller Center for Public Affairs at the University of Virginia is devoted to the discussion and debate of public policy and the U.S. Government. The site includes oral histories, presidential recordings and other multimedia.
searchable audiovisual recordings, including speeches (no transcripts)
What makes a memorable speech?
Researchers at the University of Wisconsin-Madison and Texas A & M University compiled a list of the top 100 American speeches of the 20th century, according to 137 leading scholars of American public address.