http://thegreathippo.com/devorn/stories/deadofwinter --
The Dead of Winter (horror, zombies, comedy)
I wrote this about half a year ago. It's completely finished (40,000 words), and while I certainly don't consider it a wholly remarkable work (in a lot of respects, not even good), it's definitely got some laugh-outloud moments and--at the very least--is a pretty light-hearted take on the genre.
In addition, The Adventures of Professor Von Grimskull (also on the webpage) deals with the trials and tribulations of STEAM-POWERED AIR-PIRATE ZOMBIES (I'm totally serious). So you might count that one, too. It's
very short, however.