It's always refreshing when industrious developers use technologies the way they were meant to be, and build a compelling application: Say hello to Musicplasma.
The flash front-end appears to be served by and communicating with a PHP-based web application, which I suspect uses the Amazon Web Services in very creative ways to give us information about songs and authors. This is an awesome way to discover new music. I love it. I frickin' love it. Great use of Vector Graphics.
Found them via Fred Wilson's blog.