I don't think anybody knows anything yet. It's all just speculation at this point. Some people say they'll be using some new major input method (other then motion sensing). Some say they'll just have a redesign and ride it out for as long as they can. Your best bet is to enjoy what you got on the Wii now and be patient...

I haven't heard of any. We all know that they all are working on their next platform, but I seriously doubt Nintendo is going to rush any new console to the market soon.Especially with the success of the Wii.I could only imagine even how much more successful it would be with true next-gen graphics.

there won't be one for a while so nothing is known about any potential new system just yet