
Instead of picking a station, say, "ABC FM" and listen to the songs from that station whether you like it or not, Pandora Internet Radio streams music that YOU like. Take for example, I like the band Garbage. I like the fact that it has some electronic influences, it plays rhythmic rock music, and the vocals of Shirley Manson. So, Pandora actually picks out all the songs from its database that are similar to the ones that Garbage plays. Most of the songs have electronic influences, is rocks rhythmically, and sung by a female! Remarkable!

In addition, you can refine your radio station by telling Pandora if you like or hate the song that you're listening to. There are also options to buy the CD via Amazon or iTunes.
I think that this really is a great service as you're getting free, personalized music. However, HOWEVER, you can only an enjoy unlimited supply of songs if you register. AND, you can only register IF you are a US resident. That sucks isn't it? Well, if you are a US resident, do check out Pandora Internet Radio here.