After downloading, you must register with the service by creating a user ID and password. If you want to share your music maps – and you really need to if you want to get any mileage out of the app – you also need to enter the log-in details for Facebook and/or Twitter. There is a fair amount of typing required and unfortunately, the app doesn’t support landscape keyboard, just portrait. Hopefully, this is something that’s fixed in a future release.

From there, the fun begins. You can either search for a specific location on the map, or you can ask MusicMapper to use your current location. Then, you can tag a song to that place. It doesn’t need to be a song you currently have loaded on your phone, it can be almost any song. The app provides a massive song database, through which you can search by title, artist or album names. Once you select the song for the tag, you can add a note about what the song means to you, why this location or whatever you want.

By downloading a separate free app called Rdio, you supposedly can stream the song you’ve selected from the web, but that did not work in my testing on a Nexus One. There were other issues – sometimes tags did not show up on the map after I set them, and the list view for looking at the tags as a list rather than bubbles on a map did not always display properly.

Overall, I see the potential of MusicMapper. It’s fun to see how songs relate to the places you go, and what Music Maps your friends might create. I think this app just needs a little more time in the oven before it’s done.