If you've ever despaired at the online provisions available on the Wii, rest assured that things will be very different with the Wii U. Very, very different in fact, as Nintendo is apparently more than happy for third party publishers to use their own networks on the Wii U.
Nintendo of America president Reggie Fils-Aime says that Nintendo had decided to sidestep the arguments with publishers over using their own systems. He said that Nintendo wanted to get the best of what the third party publishers had to offer to make. This would mean that deals like the one that Sony reached with Valve over having Steam on the PS3 would be fairly commonplace, and might even open the door to cross-platform play as with the PC and PS3 versions of Portal 2.