At the start of the year, Nintendo explained that while it wasn't bringing its gaming properties to the smartphone carrying millions, it would be tackling the platform as a way of attracting more people to its games and consoles. Let's not get too excited -- the above isn't an app (apparently), but a web-based portal. Nintendo's done these in the past, but they haven't been quite as feature-rich as this. You'll see a feed of your friends activities (this one's all about Mario Kart), while there's apparently separate pages for movies and rankings. There's no Nintendo Network ID required to access the service, but you will need said ID to login and establish your own rankings and upload videos. No launch dates, but we'd assume it will fall in line with the launch of the next Mario Kart installment. Oh, and there's E3 next month.