Pandora.com is a free online "radio" station that plays only music that you like.
In order to use it though, they require that you sign up for free. By doing this, pandora.com uses the information you enter to take polls and also to predict what ads to show according to the age group you 'claim' to belong to.
To set up a station or auto playlist on pandora all you do is click "Create a New Station" and type in a song name or band name. Once you do this is will use that bands characteristics to find similar bands that you may like.
When a song plays, if you like/dislike the song you can click a thumbs-up or a thumbs-down to tell the website that you want more music like this to play or not play.
There are a few things that make it a little annoying to use though. First of all, it doesn't let you listen to any song you want, only songs that are by that artist or related to the artist. Another thing that makes it annoying is that you can skip songs, but after a few skips it doesn't let you skip it any more for about an hour because they have to limit the amount of times for legal issues.
By: Peter Gruetzmacher