Thanks everyone Yup, it's done in pen, although I did start it off in pencil first. The pencil wasn't getting me the dramatic look I wanted though, so I switched to pen.
Aionios, I'm thinking of scanning it and coloring it in photoshop. Haven't used photoshop in years but I think I can get it to work out nicer than if I did it in pen.
Corky, At one time I was going to get into being a tattoo artist but I wasn't fond of the idea of having to get a tattoo myself. I'd only get one for very specific reasons, not just for a job I do have a couple of people with my designs on them that I drew though.
Keith, thanks and good luck with your last final