It looks the claims of having some quality conversation whilst waiting to race have been wildly overblown.
"You can create rooms for friends to join and even text chat while you're waiting for other racers," Nintendo of Europe told IGN about the title on Tuesday.
This led to assumptions that a USB keyboard or perhaps the Wiimote could be used to type in those messages.
Alas, it is not to be. Nintendo contacted IGN to clarify what they meant, and it's only going to be a couple of pre-filled in phrases to throw back and forth to each other.
"Apparently, gamers will only be able to select from a pre-determined number of phrases that can be sent along as rudimentary texts before matches," explained IGN in its recent correction.
http://www.nintendorevolution.ca/02282008/15/nintendo_no_text_chat_in_mario_kart_wii