Yesterday, Pandora, the reigning champion of Internet radio sites you visit while killing time in the cubicle, got completely relaunched. The new site is not only easier on the eyes than the late '90s AOL dial-up aesthetic of the old version, but it's been rewritten in HTML 5 instead of Flash, which means it's faster, more stable and uses less of your computer's resources.
In new Pandora, you now have access to unlimited hours of listening for the first time, and you and your friends get new profiles where you can view/comment on the stuff each other's been listening to.
Even if you've never been a big fan of Pandora (we spend most of our time in Spotify, personally) go ahead and give it a spin. You won't regret it.