I've been a big fan of the Broadside cartoons in Navy Times for a long time. Whenever I pick up a copy of Navy Times, the first thing I do is flip to the back and read the Broadside cartoon. I actually got to meet the artist, Jeff Bacon, while I was in Monterey back in 1999-2001.
Anyway, I discovered Jeff has started a Broadside Blog. He puts up new cartoons and has caption contests, but he has some other more thought provoking good content like this one about Success in Iraq and this one with the Hero of the Week. Check it out.