I just finished reading Good Omens by Neil Gaimon (famous comic book writer: Sandman, 1602, etc) and Terry Pratcher (the guy who wrote the diskworld books). Damn, those two bastards made a stroy about the Apocalypse hilarious. It's a pretty funny book in which the Anti-Christ was accidentally switched at birth. His Hell Hound becomes a little mongrel dog; the Four Horsemen ride motorcycles instead of horses; the Serpent from Genesis drives around and listens to tapes of Queen all day. It's damn funny stuff.
Amazon links in case anyone's interested: paperback hard cover.