Back when news of the name Wii hit, I spent some time thinking of other names that might have fit Nintendo's goals that I would have liked better. One of my favorites was ion. I think that would make a cool name for a Nintendo website, too. The full name would be i on Nintendo, as in Eye on Nintendo. It could be shortened to ion, which is not only a shortening of the full name, but also a recursive acronym. The i is a play on Nintendo's Wii logo, of course. As of this moment, the domain name is available in multiple forms, too.
Of course, I still like PlanetN.com better, and it might be available a week from today according to whois.