There have been several speculated launch dates for the Wii based on previous press releases from Nintendo and listings of game release dates. This one comes in the form of one big package with matching console and game releases. A German website, World of Games, has listed a Wii and a few Wii games with a release and launch date.

The date shown on the website is listed as November 9th 2006. This matches Nintendo's tradition with releasing systems in November and coincides with the several launch games as listed on the same website. This looks to be the most accurate release and launch dates listed so far, but as usual this is pure speculation and you should take it with a grain of salt.  

Go Nintendo also has explained that their very own podcast staffer, Lube, has been shouting this date out in their recent podcasts. If I were to shout anything out, I would say the same date. Although, I've been hoping for the October 2nd speculated release, it seems very unlikely.