I just did this one tonight, for
this contest. However, the deadline is June 30th, so I probably won't get a chance to enter. It took a few hours to finish and was done using pencil and ink. You can view a larger version
here.
When I originally outlined it, I was about ready to throw it away, but I went and inked/shaded it, even though I didn't really like it. I still don't like the result too much, but I enjoyed working on it.
Note: Yeah, my lettering sucks. I really need to work on that.