An anonymous reader writes "The music recommendation/music discovery space seems to be heating up this year. Two big recent features on music recommendation engines: ExtremeTech has a round-up and reviews of eight leading services. Of the eight, Last.fm emerges as the winner: "Last.fm is by far the best out there, possessing a huge library of music, a great community, and a recommendation feature that will blow you away." Meanwhile, Pitchforkmedia.com just ran an in-depth feature about the hows and whys of music recommendation software, that tells the story going back to the '90s, and interviews people at Last.fm, Pandora, MusicIP, and the startup Echo Nest: '"Our hope is to answer every possible question about music that ever existed. If we can pull that off, then I think we're doing very well," says [Brian] Whitman.'"