the Joint Comittee on Preidential inauguration has information on arrangements for the current and past inaugurations.
Our earlier posting on presidential transitions links to useful resources on the admin process of changing administration.
USA.gov has background information and trivia on what happens at inaugurations. Find out the shortest speech , the longest and what the weather was like!
C-span has video footage on youtube of inaugural speeches.
The Avalon Project has transcripts of all speeches from George Washington onwards.
The Library of Congress has the great
U.S. Presidential Inaugurations: "I Do Solemnly Swear..." A Resource Guide . this has a chronology . Each presidential entry has images of photographs, ephemera and links to documents.
See fascinating diaries, photographs and prints about the inauguration of Abraham Lincoln
See some guides prepared for teachers by the Library of Congress with suggested lessons using primary resources.
Emerging America also has some useful suggestions.