I have and I have to recommend it heartily. I just read the first two books in the graphic novels of the comic books Y-the last man.
It's one of the best comic books I've ever read.
Now, I'm not a regular comic book junkie. I've read things Rob S. has recommended and several popular series like The Crow, but I'm by no means an aficionado. I'm usually a text-print book reader.
But I have to tell you, this is amazing. The story is astonishingly good and the art is too. Do yourself a favor and seek it out, from the beginning.
When I finish with this, a new book just came in the mail for me to start: The Last Three Miles, which only just became available. You know the author from his opinion mill.