When I first saw Shane Vorhaben's work I thought it must be digital. His line work is nearly flawless. I looked further and realized that many of his drawings were simply scanned from his Moleskine sketchbook—I was blown away.
I particularly enjoy that he decided to make use of the "Moleskine History" insert that comes with every Moleskine sketchbook.
His flickr page is full of wonderful drawings which made it nearly impossible for me to choose which ones to feature here. I recommend heading over there and exploring them all for yourself.
Seriously though... he must have a robot drawing these! Once upon a time, Shane and I were going to collaborate on a drawing—maybe that will happen soon!