Nintendo DS emulated on the PSP
It appears that a Japanese developer who goes by the name NekoMiMi has released the source code for the first Nintendo DS emulator for the PSP. While the emulator isn't quite in working condition, this still is quite an accomplishment. A makefile is included and instructions, in (rough) english, for building the emulator are on the download page. You can check it out for yourself using the link below.
DeSmuME Source Download (Japanese)Via
PSPUpdates