Sniper has released 2 versions in quick succession of his DS project, heres the info:

Small update which fix some minor bugs and has now full update functionality.

This tool is an Eclipse CDT plugin for C/C++ development especially for the Nintendo DS target system.

Currently supported features:

easy to use managed build system based on the GNU toolchain
supports C and C++ projects, also ASM Programming
different project types
NDS ROM - ARM9 Sources + NDS Tool
NDS ARM7 Code - ARM7 Sources + ObjCopy
NDS ARM7 Library - generates a static link lib
NDS ARM9 Library - generates a static link lib
includes ObjCopy and NDS Tool in the toolchain