Jorge Colombo creates paintings... on his iPhone.  He uses a application called Brushes, which allows him to paint with his finger.  He captures scenes of New York City on his little 3.5 inch digital canvas.  The backlit screen allows for easy nighttime painting sessions.

If you want to see how it's done, Jorge's website features movies of the paintings in progress (a feature of Brushes).  I'm amazed and inspired.