I played around a bit with some of the NES and oldschool GB emulators on my GBA last year. I just picked up a DS lite last week and am curious if there are ports or any emulators for it. I know I can still run the GBA emus on it, but I noticed slowdowns in some of them, especially the 16 bit stuff.

I would think the DS would be fast enough to the 16 bit stuff, and maybe some 80s arcade games too. I'd appreciate any link to DS emus or pages covering DS emu scene development.