I had a really nasty zombie dream in which I followed next to all of Max Brook's advice on what to do. For some reason, I was living in an apartment and the streets were laden with a very dense fog. Almost a Silent Hill kind of thing. And I remember the sun shining, though it was obscured by the gray sky.
It looked a bit like 28 Days Later. Actually, it looked more like this:
http://www.gorehoundinc.com/index2.html