Get it from here:
http://blender.blogchina.com/inc/tut-pencil.rar
it looks like this uses an animated material which deforms the mesh, in order to make multiple lines. Its really cool.
Update:
I've had a look at this, and its a combination of a bunch of stuff. There is a material with an IPO, which is basically randomised. This affects the scale of the object (size xyz and displace IPO's) This is also set to affect the normal and displace in the texture. It then uses a motion blur to run through the material IPO, which displaces the mesh and makes the outside lines. The charcoal effect is a cleer texture which looks pretty average on its own, but when blurred looks a lot like charcoal. It may be possible to texture it so it looks like crayon or brush strokes, but I'm not sure yet. I imagine each blur frame could be textured in that way somehow, but I'm not sure.
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