As expected, Amazon.com (NSDQ: AMZN) has launched its online music store, called “Amazon MP3”. It is a DRM-free, MP3 format store with over 2 million songs from more than 180,000 artists represented by over 20,000 major and independent labels, it says. Most songs are priced between 89 cents and 99 cents, with more than 1 million songs priced at 89 cents, the company said. Most albums are priced between $5.99 and $9.99. The two majors that have signed up are Universal Music Group, part of Vivendi (EPA: VIV), and EMI.

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The Mp3 format means users can now download to Apple’s (NSDQ: AAPL) iPod, among others. Amazon MP3 has a downloader app., which it says makes it easy to add downloads to iTunes and Windows Media Player, and then sync up to devices.

More in the release and company blog post here.