This is a network graph visualization of the artists in a Last.fm users listening history and the artists that are similar. If you have a Last.fm account, you can enter your userid below and see a picture of your musical landscape. You can include your friends data and see where you overlap. Artists are colored by the last user to listen to them and simlar artists are the blue ones.
Blue dots that settle into the middle of the graph and are connected to lots of the artists you lsten to, or are connected to what your friends are into, might be bands worth checking out.