First off in the one and only Paul Pope: http://pulphope.blogspot.com/
From a link on the Pope blog, Toby Cypress who is doing some amazing comic work and art: http://tobycypress.blogspot.com/ I love this Robot Fighter painting.
Todd Klein, Comic letterer and colorist. He has lots of great posts about logos, design, color and the like: http://kleinletters.com/Blog/
all work is © the artist mentioned and used with out permission.