Rall is best known for his comic strips which appear regularly in syndication in major market newspapers and magazines. He also writes an opinion column and has a weekly radio show on Sunday nights.
Here are a couple of his 'toons to check out which deal with godless subject matter...
(BOTH LINKS BROKEN!)
His book published in March 1998 Revenge of the Latchkey Kids contains a chapter on religion. (Ed. need salient quote from the book here.)
His official website, www.rall.com, is rich with his work.