If you haven't heard about it yet, watch this video.
http://www.youtube.com/watch?v=KQoEneMQ4R4This is a PREVIEW of an exploit in the system menu that comex found that will let us run custom code on an UN MODDED WII , which means we can basically set up homebrew on a wii without twilight princess, or even a dvd drive. It's just a channel on an SD card. Currently it is just set up to load the HBC but more will come soon.
We need help to make this a more stable exploit, so it would be great if everyone could go to this page and follow the instructions
http://forum.wiibrew.org/read.php?21,13182,13186#msg-13186