Scobleizer: Microsoft Geek Blogger: "The system that Savage Beast has built is quite interesting -- it's an all-Internet Explorer application (doesn't look like one, though). They've been paying musicians to come in and categorize thousands of songs. "
That's the quote that stuck out to me. This system sounds like what I've been kicking around, except it's used more as a tool of the established record labels.
I think it's fascinating that they are paying people to create these associations. With the right system setup, I think people will do all that work for free. Not to mention it will end up being a more accurate representation.