http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.71/Freestyle

If I read their update correctly, my reading comprehension was never that good, then Blender now has the ability to render out a 3D model into a convincing looking hand-drawn sketch. That doesn’t make sense to me. You’d have to model out the entire object before you get output that is a bunch of simple strokes.

The problem I have with it is that is should be the other way around. Much like ZBrush makes sculpting digital 3D models almost too intuitively, 3D modeling can be even easier if you could translate a line drawing into a fully 3D realized object.

So, that is the next challenge to master, Blender! I dare you!