Okay, I've always avoided Something Awful, mainly because the name reminded me of pages like Rotten.com (note there's no link. I don't go there), pages that take joy in showing you the most horrible things you will ever see. I'm not a big fan of that, but if they want to post that stuff, more power to them. You can go, I choose not to.
Anyway, I ended up on Something Awful today, and I lauged my ass off. granted, there's some gross stuff (the squeamish should avoid "Movie Review: 'Cheerleader Autopsy'") but most of it is pretty good. I really dug the hell out of the photoshop contests, and I will provide a selection for you to link to, with samples from each one. Note: it was very difficult to pare it down to one example for each page, but I managed (except for Sin City, I had to do three.).