Kind of surprised Saturday Morning Breakfast Cereal hasn't been mentioned yet. Lots of philosophical hilarity, with notes of science, religion, robots, economics, and nerd references.
As far as things that have been mentioned, seconding Perry Bible Fellowship, xkcd, the Oatmeal, and Cyanide and Happiness
But when a long train of abuses and usurpations, pursuing invariably the same object, evinces a design to reduce them under absolute despotism, it is their right, it is their duty, to throw off such government and provide new guards for their future security.