I made a fun and, dare I say, useful bookmarklet using the awesome Kynetx Appbuilder and YQL.
First, drag this link to your bookmark bar:
Next, log in to Facebook and go to your favorite band's Facebook page.
Then, click the bookmarklet.
Voilà! A handy list full of links to similar artists you can check out. Some you may know, but others you may discover.
UPDATE: FaceTheMusic earned an honorable mention in the YQL + Kynetx app contest!