The latest New Yorker arrived yesterday featuring a dense, murky cover image. After checking the title ("Finger Painting" by Jorge Colombo) I thought, "Ahhh, he painted it with his fingers. That explains it!" I was partially correct. Colombo did create the drawing with his fingers, but his medium of choice? The Brushes app on his iPhone.
According to the New Yorker website, there will be a new video like this one every week.
http://www.newyorker.com/online/blogs/tny/2009/05/jorge-colombo-iphone-cover....