That bowtie-wearing, tuba-playing, onetime vice presidential candidate on the National Radical Meadow Party ticket, <A HREF="http://www.npr.org/templates/story/story.php?storyId=95441421&ps=bb3">Opus</A>, is headed for the great comic strip in the sky. Cartoonist Berkeley Breathed announced he is giving up his Sunday comic strip Opus to focus on children's books.