As part of its push for digital content, Nintendo has unveiled its new Wii Karaoke U app on the eShop. Unlike traditional karaoke games, such as Singstar, you don’t pay for a copy of the game. Instead, you “rent” the software for a period of time. This is ideal if you like to get together with friends once in a blue moon because you can simply pay a small one-off fee to play the app. You can make full use of the software ’til your throats ache and then leave it for when you next use it. Although you cannot buy the software permanently, the longer rental options work out at a decent price. It really depends on usage and what you’re looking for with this.