From A Case For Pencils, a look at the tools used by four cartoonists: Edward Steed, Chris Cater, Julian Rowe, and Jason Adam Katzenstein (links to their websites found on the linked site).
[Photo of pencil sharpener with SpongeBob SquarePants pencil by Liza Donnelly]
Thanks for posting about the site!! I hope to get more interviews up there soon!