The two best things, musically, to happen to the internet!

Pandora is a great website for exploring new artists just by listening to artists you are already familiar with. It's free...and well it can be anonymous if you make up a fake email. So get on Pandora.com and start discovering new artists!

Last.FM is a great website as well. As with Pandora, it does require registration but its totally free. It creates a super online radio station catered to the artists you love. Just hit "play library" and you can be listening to Johnny Cash, then Lil' Wayne, and then finish off with Slayer. Its an instant party maker, because you can add artists to play to your library as you listen. A few similar artists are suggested, but not to the extent that Pandora does. So hop on Last.FM and create your perfect radio station for that next party!