- Nintendo Network Sidebar - you see whether you are connected to NN, your notifications pop out, you see your digital 'gamer card'/stats, and your Mii will make cool movements: for example when you get break a record it'll happily jump in the air. - You have your big game artwork as main 'channel'. Around this game/disk-channel you have your other channels. They scroll to the right when your Wii pointer touches the border of the screen, so you do not have to bush buttons to scroll.
Btw, this mockup wasn't yet fully ready, I kind of rushed it :$ When I have time I will do finishing touch.