Nintendo Japan has posted in their site's Q&A section that they will not be releasing a DVD-ready Wii in 2007. They claimed to need to focus on current production to meet worldwide demand (even though such a Wii model would and will have nearly identical hardware.)
But we'll shed no tears over this news. Why anyone would want to play DVDs on their Wii is beyond us. And from the way Nintendo is dragging their feet on the matter, they don't seem to understand the impulse much either.