The problem with this approach is that most people don't try new music because they're into, say, Brazilian chill. There's a need for a trusted reference -- a friend's suggestion, a review piques your interest, whatever. So just setting up a domain for people who like that genre isn't necessarily going to go far. Most of the music would probably be crap, and not worth my time -- hence that need for reference. I won't assume that a domain name means good music, but I do, for instance, take Anji Bee's (<a href="http://www.anjibee.com/category/podcast/chillcast/" rel="nofollow">http://www.anjibee.com/category/podcast/chillcast/</a>) suggestions because she has a proven track record of finding and playing excellent chill.