Um, if you have taken that info from the infamous interview where some big Nintendo-whatever was talking about the Wii and future plans I have to break your bubble. The person was talking about Zelda AND how Wii can download new stuff to games but he made the mistake of mention them both in the same sentence so people assumed that new dungeons and the like would be download-able for The Legend of Zelda. Nintendo later had release a statement because of that which said that although levels, maps and dungeons can be made available for download to games, Zelda will not be one of them (other extra like galleries or such, yes but not something to improve the actual game).
As for the game right now? No. No extra content on the Wii version of the game.