Heads Up: Nintendo has released system menu 4.2 for the Wii. This update will delete The Homebrew Channel, all cIOS files and remove bootmii from your system. It appears that all IOS files have been updated and a few new ones installed. Effectively, it will remove all homebrew and iso loading capabilities from your console.  So for now do not not upgrade. Not much else is known about the update, but it doesn't appear to add any new functionality.