Since one of their songs popped up on Pandora.com, I've been a fan of the band Artichoke.
Their masterpiece is a two-volume CD set called "Twenty-Six Scientists (Anning - Zeno"). It's a collection of musical biographies of scientists both famous and obscure. Each song is different and each song is great. I just got volume two in the mail last week and I'm still listening to it. If you, or someone you know is a scientist or just likes science, you really need this.
To introduce you to the band, and in honor of the upcoming Carl Sagan Day, here's a biography of one of the most famous astronomers of all time
It is the only bad thing about the albums: no Carl Sagan song. Ah well. They've also got a fabulous "kids" album called "26 Animals". Scientifically accurate and damned catchy, it's an album that you wouldn't mind your kids playing over and over.
Listening to while posting: "vulture" by Artichoke