giantpune has released Casper version 0.1, a new program for the Wii designed to load bootmii from an SD card. You can use this application with the homebrew exploit of your choice to boot a variety of things, including NEEK, on an otherwise un-modded Wii. Check out the project page for the download, system requirements, and instructions, and be sure to join the on-going discussion linked below for more information about what can be done with this app.
QUOTE: Release Notes 01/16/12
Casper is a program written for the Wii. This program was created to load bootmii from an SD card. Now you can run those fun MINI programs on your little sister's Wii even if your mom doesn't want you to hack away on it.