Here is an amazing site called Sketch Theatre that was brought to my attention by artist Steven Daily. He was recently added to this great collective that boasts a stellar lineup with artists such as Gary Baseman, Jeff McMillan, Shawn Barber, Cameron Davis, and many, many more. The site contains profiles and time-lapse videos of the artists creating sketches before your very eyes.
Click here to see the site. I urge you to click on the artist profiles to see the videos of them in action.