There doesn't seem to be a lot of info about there specifically about the stage show - if you run a site or know of one that I could add, please let me know!

Alison's review of the Broadway revival: The hills are alive...
A great fan site for the movie: The Sound of Music - A Tribute
An interesting site, part of a larger "Movie Musicals" site: The Sound of Music: From Stage to Screen
Part of a larger musicals site: The Sound of Music