I don't know why people are orgasming over a composer list. I love music as much as the next person, but I don't really care for music in SSB. There could be no music whatsoever and I'd still enjoy the game, because the music is not as important here as it would be in a game involving storytelling and emotion.
I disagree. Even if there is no coherent "story" or "plot," music plays a monumental role in setting the tone and emotion of a setting, or in Smash Bros.'s case, evoking nostalgic memories. It provides a dynamic and fitting backdrop to the game, and I can't imagine playing without it. It wouldn't be the same to battle on Onett without hearing the Earthbound theme, or to duke it out on Corneria without Starfox's theme, or to fight on Mushroom Kingdom II without the Super Mario Bros 2 theme, etc.
I do agree that seeing a list of composers doesn't really sate my extreme excitement about SSBB though!
Also is says planned for 2007 release, so hopefully we will see it before Christmas.