Here is a good article for Blender render and lighting developers.-
I was linked to this site from here-
I hope that these are good links for the Blender.org coders.
There's another thread on this topic posted about 2 hours earlier: http://www.blender.org/modules.php?op=modload&name=phpBB2&file=viewtopic&t=1688
I'll let the discussion continue there.