Just want to start a bit of a brainstorm for what Wii channels you'd like to see in the not to distant future.
A large world that you can roam with your Mii's and interact with other Wii's online. Perhaps being able to invite other owners to play games online (when that functionality arrives), Mii mini-games, etc
A channel where you can download DS game demo's, some DS + Wii games interaction (Trading data with Spore comes to mind).
A mp3/wma/Ogg player, that can play off the SD card or a USB plug-in would be a nice bonus.
Also thinking maybe a system like Xbox Live's achievements, where you can store certain milestones in different games you play, and compare them with your friends online.
What would you like to see?