I really hope every one gets to take a peek at CheemingBoey'samazing flickr set. This is the kind of stuff that amazes and inspires me. I love finding the coolest art in the oddest places. I could stare at these all day long and this is one of my favorites. The even sweeter thing is...these are for sale. Incredible stuff. Enjoy.
Update...and I already asked what kind of pens are used for this. Update number 2: A simple Sharpie is used.