Pandora

Read a quick blurb about this the other day in an email and after a few days of trying it, I really dig it. The site is www.Pandora.com. You put in artists or songs and it tries to guess like artists and music to play for you as well. You can also rate the songs thumbs up or down and unlike sirius or xm radio online, the songs are sent at higher quality. You can also jump to the next song if you want.