Wired is reporting that Warner Music Group began selling music on Amazon in the MP3 format without digital rights management protection. Amazon has added all of WMG’s digitized music catalog to the store.

Amazon’s store now contains over 2.9 million tracks, all in the unprotected MP3 format and including music from three of the world’s four major labels. EMI and Universal are already providing music to the DRM free store.

This should be a great benefit to consumers who are confused about DRM and frankly don’t want to know about it. Hopefully it will also help Amazon build a stronger competitor to iTunes and drive innovation.

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