Well, according to the article at Kotaku, an eleven-year-old girl writes a letter to Nintendo, requesting a Nintendo DS because apparently, her parents don't buy her one. She also mentions that her class is writing business letters. Surprisingly, Nintendo writes back, and sends a Nintendo DS with a suitable game for children, of course, after speaking with the school principal. How's that for a great ending?

... I hate the bitch. Ofc, it's DS. Not a big deal for Nintendo now.

Will this work with the Wii U once it comes out?

I think it will work when a successor of Wii U comes out.