It would be nice if Nintendo made the Wii's online infrastructure more social - made it more "Facebook-y". I would like to know what my friends are playing. I would like to see game demos (perhaps downoaded to SD cards?), not have to put new friends' code for certain games like Mario Kart Wii and Smash (but instead import from my Wii's friends' list) etc. I also think there should be a seperate Wiiware channel. I don't think a lot of people know it exists.
There is just a lot of Nintendo can do to improve it's online. Will Nintendo do an overhaul? Or do you think they just don't care? I can see the Wii having another 3-4 years left so I don't think it's not too late.