Sheppard, Josh http://www.thestoryboardartist.com
Storyboards for film and television, as well as a storyboard tutorial and many storyboarding related links. Samples in color, black and white, ink and pencil.
Lyle, Billy http://www.billylyle.com/
Storyboard artist and filmmaker from Comox British Columbia. Site includes art, comics and storyboards as well as his resume.