IMDb - Xanadu: Credits for Xanadu (1980) in the IMDB.
The 80's Movies Rewind: Features a review, trivia, and information about filming locations.
Xanadu Musical: Fan site with plot summary, quotes, cast profiles, downloads, and links.
Xanadu-A Tribute: A fan site with cast biographies, picture gallery, soundtrack information, message board, costuming, and trivia.