Do this now. Go to Pandora.com. Pick your favorite song in the world (only one). Now watch in amazement as the site creates a streaming radio station based on the structure of that song. And not a crappy station with songs KINDA like your favorite song. A GOOD station with songs VERY much like the one you picked. Pandora is even better than the streaming SomaFM stations on iTunes, (which are no slouches—try Groove Salad). It’s a great way to find new bands like other bands you already…um, like. When you hear a new song you like, you can click on it and buy it from Amazon. Very cool. Now you know.