I'm bringing this thread back from the dead for a VERY IMPORTANT UPDATE. The official Super Smash Bros. Brawl site has just gone up today, which can be found here:
http://www.smashbros.com/en_us/index.html
You can view it in english and right now there isn't much, all they show is how to play the game and the battlefield level (along with screenshots of already confirmed characters), but they also show the list of musicians that will be contributing to the game. Needless to say, the list is pretty hawt.
Also, there's evidence showing that we are indeed getting the game THIS YEAR (currently says "planned for 2007 release"). My guess is that we'll see it sometime in October or November, since they've already announced MP3's release date (08-20-07) and they won't repeat their mistake of releasing SSB before or right next to a MP game again (Melee killed MP2's sales). We'll probably see Mario Galaxy in time for the holiday season, which will put it in either at late November or early-to-mid December. They may release Galaxy first and save Brawl for the holiday icon, but I doubt it. Releasing Brawl first would be the smarter move.
Check the site periodically, as it has several other sections as well (currently down) like Characters, Items, Modes, and Notices.