Think of it as doodling turned into a new art/meditation form.
http://www.zentangle.com/
Here are some images:
http://www.google.com/search?hl=en&s...y73Ng&bav=on.2,or.r_gc.r_pw.&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&biw=1280&bih=610
Using the B&W photo is a great idea.