Courtesy of marcan42, this The very first working test of BootMii. BootMii takes over the boot process of the Wii and lets you run almost anything (even security code, a backup/restore utility, you name it) from an SD card, before most of the system even starts booting.
To quote: It is a huge step towards "brickproofing" a Wii, as it will still work even if you thoroughly screw up your filesystem. You could even format it entirely and it would still work.
Here I'm testing it with a small program that modifies the boot code (boot2) to boot into the Homebrew Channel instead of the normal system menu. Pop the SD card in, the Wii boots to HBC. Take it out, it reverts to normal boot. Real handy for coders.
To those that claimed that System Menu channels were more convenient (read: saved you a click or two) compared to running homebrew off of HBC: take that! :-)
Sorry for the crappy video. My 5 year old digital camera finally decided to crap out, so I had to film this using my cellphone. More PlayStation 3 News...