In 1972, Marguerite Hart, the first Children's Librarian in Troy, Michigan, wrote to dozens of actors, artists, musicians, politicians and writers to ask them to send letters to the Children of Troy about the importance of libraries, and their memories of libraries and books. She got 97 letters in return! These are all posted on the library website, and they are well worth a perusal.
I love running across stories like this on the Internets. I've met a lot of children's librarians, and so many of them share Hart's fantastic qualities: Imagination, dedication and a willingness to ask for the moon!