See it here.
I used a photo of feminist Lena Dunham as my subject -- found her pic at The Other McCain.
It's not that good, but I learned a lot. This technique works best if you start with a fairly clean photo without a lot of shadows. Basically, you start by taking the photo and applying the sketch/stamp filter, and adjusting the black and white so that the lines are as clean as possible. I'll try it again with a more suitable photograph.