I don't have any decent larger images of the avatar because it's from a t-shirt graphic. One of my friends back in Portland, OR used to play drums in the metal band ENGORGED, and this is one of their shirts.
Here's a slightly larger image of the graphic: Engorged Shirt on photobucket
(note that the back graphic is a take on the Hydra logo)
Anyways, it's one of my favorite shirts! Thanks for asking.