I bought an SD card for my Wii this weekend, and the first thing I did was set up the homebrew channel
. Oh man, things have gotten easier since I first tried DS homebrew. You just copy the installer to your SD card, replace your Zelda saves with a hacked version (the "twilight hack"), and then load up the hacked saves. It gets installed right to your main menu, no complicated boot process, no scary firmware reflashing, no warranty-invalidating chipping. I can't wait to try some of my own homebrew hacking.
Also, now that I have an SD card, what's the deal with the Wii store? Do I have to make backups of everything I buy, or can I redownload it? I assume the games files are tied to my hardware.