Franz' "Dynamic Learning Center" is online: "Designed for both teachers and students, this website features examples designed to introduce future developers to the power of Common Lisp."

Wow, thoughtful lisp exercises for students. Teaching tools written in lisp. On a site running on Lisp, and sponsored by Franz but remaining implementation neutral. This could be the start of a great resource.

They need submissions (I guess they better let people know what the copyright/licensing policies are).