Another cartoonist, this time also a librarian: Stephanie Piro. Her website is great - you can catch up on her new book news, purchase previous cartoons, even hire her to illustrate your next book:
http://www.stephaniepiro.com/

She also has a CafePress site with librarian/book lover/baby gifts:
http://www.cafepress.com/saturdaychick

She will be presenting on her life as a cartoonist and librarian at the upcoming New Hampshire Library Association spring conference: Innovate in '08 - Library Basics and Beyond http://www.nhlibrarians.org/springconference.html.
I bet it will be a session you won't want to miss! If you do have to miss it, maybe she would come to speak at your next conference...