I've always loved author Rudy Rucker's artwork. In fact, he drew some cartoons for the early issues of bOING bOING (the print zine) in the late 1980s.
He's also a painter, and he just posted a long entry on his blog about his paintings and his process of getting them made into prints. Link
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects