DeSmuME Wii is a port of the Nintendo DS emulator DeSmuME to Wii homebrew.

At this point, 95% of DS games should be able to be booted and about 30% of those should be fully playable.

News source: http://www.nintendomax.com/viewtopic.php?t=12001&f=54 & http://www.wii-addict.fr/forum/DeSmuMe-Wii-R185-t20417.html

http://code.google.com/p/desmumewii/