UPDATE: BB reader Allen Knutson reminded me that Mark posted about Target's 2003 Halloween campaign! Link
UPDATE:
John Carey made points to an OSX icon set based on the illustrations. Link
FINAL UPDATE: Drawn! added the following to their original post: "To clear up any confusion over who did what, Sheraton from CSA points out that this year's illustrations were done by former CSA artist Jason Shulte, and the icons seen here… are from 2003."