More Blender questions! Procedural Textures

Ok, since we're all bugging Gaia and Domino, here's mine: Got any good references to procedural texture coding tutorials? I want to write one but the doc seems to be.. er.. sparse.

You want to "Code" the procedural texturing?

pssst ... there are tons of procedural texture plugins available for blender ... don't tell anybody ... top secret

http://www-users.cs.umn.edu/~mein/blender/plugins/texture.html

and as curious as i am i was looking around a bit and found this :

http://download.blender.org/documentation/htmlI/ch27.html
https://svn.blender.org/svnroot/bf-extensions/contrib/2_4x/plugins/texture/src/

And still i am struggling with my glas texture
If i only knew why the frame renderer in blender creates such beautifull results, but the texture baker later comes out with messy blockie crap at some places on the texture while at other places it just renders fine ...grrr...

I've also been looking at these lately and know what Meade's talking about. The docs for the API are definitely lacking.

For example, plugin_tex_doit has 3 input floats, float *texvec, that are supposed to specify the location but.. er.. what do I do with these? I see all 3 give values between -1 and 1. I thought blender textures were similar ot SL ones - what's the 3rd float for? Will they always be -1 to 1?

And what about node textures? There seems to be only bricks & checkers - is there a way to add more or will that take a blender rebuild?