Many people like to listen to a wide variety of musical styles. If you're looking for other artists/groups that are similar musically, Music Plasma is an excellent search tool.
Results are produced in a visual format for easy digestion. Clusters of artists symbolise a relation of musical style or era and each artist is linked to others to represent their affiliation. Clicking on individual artists also produces a discography, if you are keen to track down some of their other works.