Shaun of the Dead, while not necessarily a fantastic script/story/whatever, was by far the most intelligent parody I have ever seen and I hold in very high esteem for showing people like Mel Brooks that you don't have to be dirty or stupid to be funny and make fun of something (Mel only does that half the time - the writers of Scary Movie need to be drug out of bed, flayed, thrown into a pit of lye, and then shit upon).