Found this awesome zombie themed art while browsing the web. Its drawn by an artist who goes by Jason Chan. He has some pretty cool imagery on his website, though some of it is a tad Not Safe For Work. You have been warned. His gallery doesn't seem to be updated anymore. Instead he seems to be opting to post his latest art directly to his blog.

Also if his artwork looks familiar to you, its probably because you saw it in the special features section of the I Am Legend DVD. Jason was commissioned to do two of the comics for the movie. They turned out really well plus you can even view them online here. Warning blood and sad music.