Fecal Face

Don't be put off by the name. This website opens a window on the world of low-brow art. It's my favorite site at the moment, especially the video section which shows visits to some of the artist's studios. The above image is of Shepard Fairey at work, he's the guy responsible for the Obey Giant.

Nastuh

This German visual effects artist has a fascinating website that allows you to see the before and after of his work on many of the ads he has done. While you watch the ad in the right-hand frame you can see the footage he worked from in the left-hand frame.