The only problem that I see is that you can’t search for music genres which would have been a great addition. Most users will not know the name of the artist or the title of the song and could have problems finding exactly what they would like to listen to. I would suggest to search for specific genres nevertheless, this ensures that you receive lots of links. It can be used to search for artists if you do know their name or an album / song title.

I have been using the DRM Free Music Search mainly to visit the music sites that are in its index. The about page lists them all and provides links to their websites directly. Some do require registration before you can listen to songs, some offer only samples of each tune and cut the music after some seconds.

I think that this is the coming way of music distribution. Musicians do not need record labels anymore to spread their music. All they need is to record the music and upload it to a DRM free portal to make it available to a worldwide audience. Concerts and promotions in (small) clubs is their promotion, not tv advertisement.