Hmm, some sharp commentary right there. From Wikipedia:
"Nintendo's spelling of "Wii" with two lower-case "i" characters is meant to resemble two people standing side by side, representing players gathering together, as well as to represent the Wii Remote and Nunchuk."
"Wii sounds like 'we', which emphasizes that the console is for everyone. Wii can easily be remembered by people around the world, no matter what language they speak. No confusion."
That wasn't too hard, was it?
Wii U (we you) probably has similiar inspiration.
But yes, it does sound a bit silly.