Google Earth.
Zooming in on a geographical location reveals more artists. I enjoy geography but my main motivation for this style of organization was my love for world music. It's quite fun to get a little info on where your music is coming from, you learn a lot about the area of the world and for me gives me greater insight into the music. You can also use the flight simulator to fly to your favorite music... i've got on some "african expeditions" that way - haha. Posting a full tutorial video soon.