This website is great becuase it is a form of personalized internet radio.  I can go to the library and sit for hours and rock out and not even realize time has passed, it is also a great to get exposed to many new types of bands in a certain genre.  Start you profile here

Paddy’s Top 5 Pandora Stations (no order):

Atmosphere

M83

Buckwheat Zydeco

Jimmy Cliff

Gorillaz