devkitPro is a great dev platform for all Nintendo DS homebrew, and also other consoles that I'm not really that familiar with: GBA, GP32, PSP, GC, Wii. It's a very nice set of free tools and libraries for Windows OS, and we should support it because there aren't really all that many.
In fact I'm using it myself - for ARM-related stuff, including GDEMU project. The VMS for NDS was built using devkitPro for example. There is some work being done to have SH4 family support in there as well, so that should also be interesting to Dreamcast homebrew community.