NPR texture tutorials

Blender:

Nick Tower blender stuff - awesome! I've had a play with the techniques in these tutorials, and they are awesome! It comes out really well.
http://pages.zoom.co.uk/nick.towers/tutorials/toon_shading_tutorial/toon_shading_tutorial.html

I couldn't get this to work (no reflection on the tutorial, I certainly plan to have another go) it uses textures for the effects.
http://matthieu3d.free.fr/TutoVira2/tut2en.html

A tutorial on anime-like textures for Blender. Its really good too, I've used them a couple of times.
http://mywebpage.netscape.com/ottoana/ANIME_TUT/TUTORIAL.html

There are probably more out there (specifically for Blender), I'll just have a look out for them.

other:
3d studio anime/manga character
http://www.3dtotal.com/ffa/tutorials/maya/non_photo_realistic_shading/realistic_shading.asp

shaders for Maya.
http://www.arcsecond.net/walkthroughs/nprTut.html