I will be camping out for a Wii come launch time and will be buying a whole slew of games for it. There are 27 launch titles planned so far for launch. Metroid Prime, Zelda, Metal Slug, Red Steel, Wii Sports, Rayman, Call of Duty 3 (can't wait to drive a tank) etc...
I can't wait for Super Mario Galaxy and Super Smash Brothers: Brawl. Hopefully they will come out just after the new year.
The Tokyo Game Show is Sept 22. Nintendo will be announcing the official launch date and release titles then. Maybe there will be some 3rd party sword and gun peripherials ready too.
I already have the cash saved for the system, 4 controllers, and a couple of games.