Espresso art is a pretty fascinating thing. I’m going to look into taking some classes in it when my schedule frees up a little bit. Until then, my textbook is YouTube and my classroom is the bar at work.
Here are just two examples of the fascinating, incredible designs you can make using espresso, milk, and chocolate:
http://www.youtube.com/watch?v=N8mQpf5Mzk8
http://www.youtube.com/watch?v=zUZtbtbglZE&feature=related
Here are a few of my endeavors at advancing my skill:
the many minute musings of a barista 