I discovered a few tools and a couple brain-dead hacks via which I could get my Miis onto my Mac. After that, I just did what came naturally: desktops!
I may post a how-to on this soon, since I think people will be interested to see how it’s done. Hopefully I’ll have time to post it this weekend. If we could get a flash hacker or two on this thing, we could do some seriously cool stuff. Until then, enjoy.