Another one for Wii users that we have today is Dios Mios Lite version 1.4b.  The developers have advised that prior to using Dios Mios Lite you should confirm that you console is backwards compatible to Gamecube games.  They caution that newer model Wii's as of the 2011 holiday season are not backwards compatible.  If you are backwards compatible then you will be able to load gamecube ISO's from an SD card as well as extracted ISO's from a few other sources.  Read the full features list when you download.  This update includes a fix for the GCLoader bug which is also defined in the changelog in the download.

Source:  http://code.google.com/p/diosmioslite/