IGN - Wondering how your Wii system data will make its way to Wii U? The new console's Operations Manual outlines the procedure for transferring Wii saves, WiiWare and Virtual Console titles and saves, as well as any add-on content for your Wii games, Wii Points and Mii characters. Here's the gist -- it's admittedly complicated to explain, and we'll try to have video detailing it as soon as posible.
At least Nintendo aren't forcing you to buy a memory card adapter to transfer your PS1/PS2 save datas to your PS3.
What a joke. If you didn't care, you wouldn't have posted this in the first place