Sharon Creech has a vibrant website filled with photos, biographical information, her books, and a special section on using her work in a classroom. Creech also has a new book out, Replay, which is on my to-read list.
Authors
Toni Buzzeo

Toni Buzzeo, author of Dawdle Duckling, has a site with biographical information, curriculum guides, and information on visits.
Holly Black
Holly Black, author of the Spiderwick Chronicles, Tithe, and Valiant, has a very nice website where she has sections on her books and resources to read. She also has an online journal that you can subscribe to via RSS.
Polacco Piece
The September 2005 Issue of Booklinks has a few articles available to nonsubscribers, including a piece on Patricia Polacco in pdf format. The article has a synopses of several of her books as well as an interview with Polacco.
Hiaasen's Children's Novels
Carl Hiaasen relishes reachinga new generation of greenies, an article from Seattlepi, covers both children’s books by Hiaasen, Flush and Hoot.
David Macaulay Article
The way Macaulay works is an article on David Macaulay. It takes a look at his body of work, including Cathedral and Mosque, as well as mentioning the new human body book he is working on.
Tedd Arnold Interview
Star-Gazette.COM has an interview with Tedd Arnold, where he talks about writing, reading, and celebrity authors.
Women Children's Book Illustrators
Women Children’s Book Illustrators offers biographical information on some of the top female children’s book illustrators, from Trina S. Hyman to Kate Greenaway to Beatrix Potter to Tasha Tudor. It is a joy just to flick from one illustrator to the next and see the range of illustrations these talented women have created.
Graham Salisbury

Graham Salisbury, author of Lord of the Deep and Eyes of the Emperor, has a really nice site with information on him, his books, his music, and resources for teachers and teens.