I like it. I would love to see it with some red somewhere though. And who cares where the original art came from? Not me. Check out Marcel Duchamp's artwork. And I would totally wear this on a shirt. I know the rules say it doesn't have to have the DA logo, but it would look cool if the skull had the logo between his teeth with some crack marks through it.
I must admit I entered the contest on the first day i joined this website just to see what people thought of the image, with hindsight I would have used a different image one more appropriate and one which was entirely my design.
I think as a design for something else, then this would work. however, for a deviantwear design, I don't think it represents the website. If you look at all the products they sell, they all relate back to deviantart either with the logo or common representation of the site (popular emoticons for example). This would be better off being a design for something else imo.