I thought about the Homebrew Channel approach, but don't want to deal with the specter of firmware updates, and I like having the Japanese Wii Shop channel. Also, while it isn't enough to justify the purchase alone, I now have a third Remote + Nunchuk. (I suspect my eventual fourth remote will come with a Wii Motion Plus)
There is a decent amount of DKJB Wii coverage out there, and I played DKJB on my GameCube shortly before moving to Japan, so I'm not as keen on picking that one up. If I had people to play with, I'd check out the Mario Tennis remake, too. I think I'm more likely to pick up the Klonoa remake though--I never played the PSone original, and barely touched the GBA game at an E3.