Honestly, how cool is Pandora?

I remember hearing about Pandora a long time ago and thinking that it sounded like a great web site, but misfiled it in my brain and lost it.  It was lost that is, until I got my iPhone last week and saw the free Pandora app.  You don't know what Pandora is?  I'll tell you what it is.  It is the best damn radio station you will ever listen to.  You create stations by entering in a band or a song that you really like and it starts by playing a song by the artist you entered that exemplifies the artist's style and then continues on play songs and artists that have a similar style or feel, as rated by other listeners.  You can voted thumbs up or thumbs down on each song and it fine tunes its selections.  It is a great way to discover new music.  If you hear something you love so much you have to own it, then there is a iTunes link right there on the screen to grab it.  Now, stop reading this and go try it out.