If you’ve got a Wii running System Menu 4.3 that you’d like to hack, LetterBomb should do the trick. It uses a SD card and a Wii MAC address to get all up in the Wii’s Message Board system’s exploitable holes to hack.
It sounds really easy. You visit a webpage, put in some information and then you’ll get a .zip file with all the goodies you’ll need for the hack. Simply unzip that to an SD card and you’re ready to go. After you’re all set up, a simple click of a little envelope will get you going. Boom! I’ve been told by others that it takes all of five minutes to complete.
If you’re feeling hacky this morning you’ll find all the details here.