I've taken to reading the website Working for Change lately, originally because it held the This Modern World archive, but have found some other pretty good articles on the site.  Arianna Huffington made a good point about Bush, for instance, which I found surprising as she's been known for some time as a solid moderate Republican advocate.  On the site I also discovered the hilarious editorial comics of Scott Bateman, whose work you can find on his site at http://www.batemania.com/cartoons/.  A couple recent examples that I found funny: