Started in 2011 each day an author or illustrator posts why picture books are important. This is a link to a calendar of activites and teacher's guide for November 2013.
Activities for art techniques used by children's illustrators including Nina Crews, Donald Crews, David Diaz, Ann Jonas, William Joyce, Betsy Lewin, Ted Lewin, David Small, Robert Sabuda, Peter Sis, Ed Young
A resource for students and teachers with information about artistic style, and links to promote picture book art. Although Converted to a subscription the picture book database still has links to author and illustrator information you can get to.
A collection of brief recordings of authors and illustrators saying their names. Whole teachingbooks.net requires subscription but this is accessable for free.
Website of the museum includes information on the museum and resources on outstanding picture book illustrators.
Link to the Blog at the Cotsen Children's Library of Illustration at Princeton. They also run storytimes all with incredible artistic activities.