There's bits and pieces of information floating around that revolve around Iwata Asks interviews on Nintendo's website. What I found interesting was the tidbit about the updatable operating system: 'Wii is the first system from Nintendo that we can continue to be involved in (via operating system updates) after the customer buys it. This means that Wii will greatly expand and diversify the ways in which people will enjoy games in the future.' The Wii is reported to operate on top of a proprietary form of the Linux kernel, although there are already efforts to make a GNU/Linux for the console. So, the answer to the age old question is that it already runs Linux