Lakeshore Records have announced that they will be publishing the official Soundtrack for the upcoming Live Action adaptation of "The Last Airbender" The movie soundtrack written by James Newton Howard is going to feature all the music you'll find in the movie. Set to release June 29th the Soundtrack should be pretty good, you can Order The Last Airbender Soundtrack Here unfortunately they still haven't released a soundtrack for the cartoon. Preview the Soundtrack Here
If you want to find the music of the original avatar the last airbender soundtrack head over here.