Joat has posted Dovoto's NDS library (the library Desktopman used in creating this DS tetris clone which is getting so much attention) on Sourceforge. Dovoto himself is working on a Day 1 tutorial for homebrewing which should be ready soon.
We're on the cusp of homebrew. I hereby pronounce that any dedicated homebrewer with high/high-moderate computer skills should begin working on their mini-boss concept sketches. Be sure to make it spit explosive eggs.
CORRECTION: This from Joat...
"ndslib isn't dovoto's (or mine for that matter), it's a combination of
the two 'libraries'. Right now, it's mainly register definitions, with some
routines (mine) to read the touch screen, clock and card, and an OpenGL-ish
3D library (dovoto's). In the future, it will include a lot more code and
perhaps earn the name library, but it'll be the work of several individuals."