I've made the beginnings of a lisp toolchain for the nintendo ds. It's the little brother of devkitarm you might say. It's split into an arm assembler in Common Lisp called Armish and a nintendo ds rom compiler called Liards which builds upon Armish.
If you're into Common Lisp and/or arm assembly coding, all help is appreciated (cue image of some tumbleweed rolling across your screen).