On the day that Nintendo® announced Nintendo Letterbox for the 3DS that will be available this December, they also registered the matching domain name NintendoLetterbox.com. This simply makes sense because it can help keep the "name" under the radar from sites like mine and they cover the registration so somebody doesn’t register it after hearing the news of the launch and the "name" being used.
So NintendoLetterbox.com is covered but that wasn’t the only domain name Nintendo purchased on October 21, 2011!
PullBlox.com was another domain they hand registered according to whois records.
So what is "Pull Blox"? That is the million dollar question! A new game? App? Hard to say at this point but they registered the domain and I couldn’t see anything relating to "Pull Blox" that Nintendo released already. Something to keep an eye on that is for sure.
up.biz
Hmm, Interesting but not surprising, because both words are related to their products.