http://www.live365.com is my portal to countless internet radio stations..
They let you save a favorites list, and search by genre. A nifty feature they have is next to each song played there is a link to save to a "wishlist", and you can look at those files later and look up the artist at your leisure. Also you can click a link next to each song , that takes you to Amazon.com and you can buy their CD right then. Great!